Using bindings in aggregate flex to filter an array.

​{
    "label": "zdb_POC",
    "mobileDisabled": false,
    "state": {
        "dataSourceLinks": [],
        "filters": [],
        "gridLayouts": [
            {
                "name": "Default",
                "numColumns": 12,
                "pages": [
                    {
                        "label": "Untitled",
                        "name": "f8c85d0c-83b5-45c7-867c-7eb5a9c73d4d",
                        "navigationHidden": false,
                        "widgets": [
                            {
                                "colspan": 3,
                                "column": 5,
                                "name": "chart_2",
                                "row": 4,
                                "rowspan": 3,
                                "widgetStyle": {}
                            },
                            {
                                "colspan": 5,
                                "column": 2,
                                "name": "pillbox_2",
                                "row": 9,
                                "rowspan": 1,
                                "widgetStyle": {}
                            }
                        ]
                    }
                ],
                "rowHeight": "normal",
                "selectors": [],
                "style": {
                    "alignmentX": "left",
                    "alignmentY": "top",
                    "backgroundColor": "#F2F6FA",
                    "cellSpacingX": 8,
                    "cellSpacingY": 8,
                    "fit": "original",
                    "gutterColor": "#C5D3E0"
                },
                "version": 1
            }
        ],
        "layouts": [],
        "steps": {
            "static_2": {
                "broadcastFacet": true,
                "columns": {
                    "Valu": {
                        "type": "string"
                    },
                    "Display": {
                        "type": "string"
                    }
                },
                "label": "",
                "selectMode": "singlerequired",
                "type": "staticflex",
                "values": [
                    {
                        "Display": "Dallas",
                        "valu": "[\"Dallas\"]"
                    },
                    {
                        "Display": "Boston",
                        "valu": "[\"Boston\"]"
                    },
                    {
                        "Display": "Most",
                        "valu": "[\"Dallas\",\"Boston\"]"
                    }
                ],
                "numbers": [],
                "strings": [],
                "groups": []
            },
            "test2_1": {
                "broadcastFacet": true,
                "groups": [],
                "label": "test2",
                "numbers": [],
                "query": "q = load \"zds_jobs\";\nq = group q by 'Branch__c.Name';\nq = foreach q generate 'Branch__c.Name' as 'Branch__c.Name', count() as 'count';\nq = order q by 'Branch__c.Name' asc;\n",
                "receiveFacetSource": {
                    "mode": "all",
                    "steps": []
                },
                "selectMode": "single",
                "strings": [],
                "type": "saql",
                "useGlobal": true,
                "visualizationParameters": {
                    "parameters": {
                        "autoFitMode": "keepLabels",
                        "showValues": true,
                        "bins": {
                            "breakpoints": {
                                "high": 100,
                                "low": 0
                            },
                            "bands": {
                                "high": {
                                    "color": "#008000",
                                    "label": ""
                                },
                                "low": {
                                    "color": "#B22222",
                                    "label": ""
                                },
                                "medium": {
                                    "color": "#ffa500",
                                    "label": ""
                                }
                            }
                        },
                        "legend": {
                            "descOrder": false,
                            "showHeader": true,
                            "show": true,
                            "customSize": "auto",
                            "position": "right-top",
                            "inside": false
                        },
                        "axisMode": "multi",
                        "tooltip": {
                            "content": {
                                "legend": {
                                    "showBinLabel": true,
                                    "measures": [],
                                    "showNullValues": true,
                                    "customizeLegend": false,
                                    "showPercentage": true,
                                    "showDimensions": true,
                                    "showMeasures": true,
                                    "dimensions": []
                                }
                            }
                        },
                        "visualizationType": "hbar",
                        "title": {
                            "fontSize": 14,
                            "subtitleFontSize": 11,
                            "label": "",
                            "align": "center",
                            "subtitleLabel": ""
                        },
                        "binValues": false,
                        "trellis": {
                            "flipLabels": false,
                            "showGridLines": true,
                            "size": [
                                100,
                                100
                            ],
                            "enable": false,
                            "type": "x",
                            "chartsPerLine": 4
                        },
                        "showActionMenu": true,
                        "measureAxis2": {
                            "sqrtScale": false,
                            "showTitle": true,
                            "showAxis": true,
                            "title": "",
                            "customDomain": {
                                "showDomain": false
                            }
                        },
                        "measureAxis1": {
                            "sqrtScale": false,
                            "showTitle": true,
                            "showAxis": true,
                            "title": "",
                            "customDomain": {
                                "showDomain": false
                            }
                        },
                        "theme": "wave",
                        "dimensionAxis": {
                            "showTitle": true,
                            "customSize": "auto",
                            "showAxis": true,
                            "title": "",
                            "icons": {
                                "useIcons": false,
                                "iconProps": {
                                    "fit": "cover",
                                    "column": "",
                                    "type": "round"
                                }
                            }
                        },
                        "applyConditionalFormatting": true
                    },
                    "type": "chart"
                }
            },
            "test3_1": {
                "broadcastFacet": true,
                "groups": [],
                "label": "test3",
                "numbers": [],
                "query": "q = load \"zds_jobs\";\nq = filter q by 'Branch__c.Name' in {{column(static_2.selection,[\"valu\"]).asObject()}};\nq = group q by 'Branch__c';\nq = foreach q generate 'Branch__c' as 'Branch__c', count() as 'count';\nq = order q by 'Branch__c' asc;\n",
                "receiveFacetSource": {
                    "mode": "all",
                    "steps": []
                },
                "selectMode": "single",
                "strings": [],
                "type": "saql",
                "useGlobal": true,
                "visualizationParameters": {
                    "parameters": {
                        "autoFitMode": "keepLabels",
                        "showValues": true,
                        "bins": {
                            "breakpoints": {
                                "high": 100,
                                "low": 0
                            },
                            "bands": {
                                "high": {
                                    "color": "#008000",
                                    "label": ""
                                },
                                "low": {
                                    "color": "#B22222",
                                    "label": ""
                                },
                                "medium": {
                                    "color": "#ffa500",
                                    "label": ""
                                }
                            }
                        },
                        "legend": {
                            "descOrder": false,
                            "showHeader": true,
                            "show": true,
                            "customSize": "auto",
                            "position": "right-top",
                            "inside": false
                        },
                        "axisMode": "multi",
                        "tooltip": {
                            "content": {
                                "legend": {
                                    "showBinLabel": true,
                                    "measures": [],
                                    "showNullValues": true,
                                    "customizeLegend": false,
                                    "showPercentage": true,
                                    "showDimensions": true,
                                    "showMeasures": true,
                                    "dimensions": []
                                }
                            }
                        },
                        "visualizationType": "hbar",
                        "title": {
                            "fontSize": 14,
                            "subtitleFontSize": 11,
                            "label": "",
                            "align": "center",
                            "subtitleLabel": ""
                        },
                        "binValues": false,
                        "trellis": {
                            "flipLabels": false,
                            "showGridLines": true,
                            "size": [
                                100,
                                100
                            ],
                            "enable": false,
                            "type": "x",
                            "chartsPerLine": 4
                        },
                        "showActionMenu": true,
                        "measureAxis2": {
                            "sqrtScale": false,
                            "showTitle": true,
                            "showAxis": true,
                            "title": "",
                            "customDomain": {
                                "showDomain": false
                            }
                        },
                        "measureAxis1": {
                            "sqrtScale": false,
                            "showTitle": true,
                            "showAxis": true,
                            "title": "",
                            "customDomain": {
                                "showDomain": false
                            }
                        },
                        "theme": "wave",
                        "dimensionAxis": {
                            "showTitle": true,
                            "customSize": "auto",
                            "showAxis": true,
                            "title": "",
                            "icons": {
                                "useIcons": false,
                                "iconProps": {
                                    "fit": "cover",
                                    "column": "",
                                    "type": "round"
                                }
                            }
                        },
                        "applyConditionalFormatting": true
                    },
                    "type": "chart"
                }
            }
        },
        "widgetStyle": {
            "backgroundColor": "#FFFFFF",
            "borderColor": "#E6ECF2",
            "borderEdges": [],
            "borderRadius": 0,
            "borderWidth": 1
        },
        "widgets": {
            "pillbox_2": {
                "parameters": {
                    "compact": false,
                    "exploreLink": false,
                    "fontSize": 14,
                    "selectedTab": {
                        "backgroundColor": "#0070D2",
                        "borderColor": "#C6D3E1",
                        "borderEdges": [
                            "all"
                        ],
                        "borderWidth": 1,
                        "textColor": "#FFFFFF"
                    },
                    "showActionMenu": true,
                    "step": "static_2",
                    "textColor": "#0070D2"
                },
                "type": "pillbox"
            },
            "chart_2": {
                "parameters": {
                    "autoFitMode": "keepLabels",
                    "showValues": true,
                    "bins": {
                        "breakpoints": {
                            "high": 100,
                            "low": 0
                        },
                        "bands": {
                            "high": {
                                "color": "#008000",
                                "label": ""
                            },
                            "low": {
                                "color": "#B22222",
                                "label": ""
                            },
                            "medium": {
                                "color": "#ffa500",
                                "label": ""
                            }
                        }
                    },
                    "legend": {
                        "descOrder": false,
                        "showHeader": true,
                        "show": true,
                        "customSize": "auto",
                        "position": "right-top",
                        "inside": false
                    },
                    "axisMode": "multi",
                    "tooltip": {
                        "content": {
                            "legend": {
                                "showBinLabel": true,
                                "measures": [],
                                "showNullValues": true,
                                "customizeLegend": false,
                                "showPercentage": true,
                                "showDimensions": true,
                                "showMeasures": true,
                                "dimensions": []
                            }
                        }
                    },
                    "visualizationType": "hbar",
                    "exploreLink": true,
                    "title": {
                        "fontSize": 14,
                        "subtitleFontSize": 11,
                        "label": "",
                        "align": "center",
                        "subtitleLabel": ""
                    },
                    "binValues": false,
                    "trellis": {
                        "flipLabels": false,
                        "showGridLines": true,
                        "size": [
                            100,
                            100
                        ],
                        "enable": false,
                        "type": "x",
                        "chartsPerLine": 4
                    },
                    "showActionMenu": true,
                    "measureAxis2": {
                        "sqrtScale": false,
                        "showTitle": true,
                        "showAxis": true,
                        "title": "",
                        "customDomain": {
                            "showDomain": false
                        }
                    },
                    "measureAxis1": {
                        "sqrtScale": false,
                        "showTitle": true,
                        "showAxis": true,
                        "title": "",
                        "customDomain": {
                            "showDomain": false
                        }
                    },
                    "theme": "wave",
                    "step": "test3_1",
                    "dimensionAxis": {
                        "showTitle": true,
                        "customSize": "auto",
                        "showAxis": true,
                        "title": "",
                        "icons": {
                            "useIcons": false,
                            "iconProps": {
                                "fit": "cover",
                                "column": "",
                                "type": "round"
                            }
                        }
                    },
                    "applyConditionalFormatting": true
                },
                "type": "chart"
            }
        }
    },
    "datasets": [
        {
            "id": "0Fb8W0000005sNQSAY",
            "label": "zds_jobs",
            "name": "zds_jobs",
            "url": "/services/data/v54.0/wave/datasets/0Fb8W0000005sNQSAY"
        }
    ]
}