How to use the ag-grid-community.PostConstruct function in ag-grid-community

__metadata("design:type", ag_grid_community_1.GridApi)
    ], DropZoneColumnComp.prototype, "gridApi", void 0);
    __decorate([
        ag_grid_community_1.RefSelector('eText'),
        __metadata("design:type", HTMLElement)
    ], DropZoneColumnComp.prototype, "eText", void 0);
    __decorate([
        ag_grid_community_1.RefSelector('eDragHandle'),
        __metadata("design:type", HTMLElement)
    ], DropZoneColumnComp.prototype, "eDragHandle", void 0);
    __decorate([
        ag_grid_community_1.RefSelector('btRemove'),
        __metadata("design:type", HTMLElement)
    ], DropZoneColumnComp.prototype, "btRemove", void 0);
    __decorate([
        ag_grid_community_1.PostConstruct,
        __metadata("design:type", Function),
        __metadata("design:paramtypes", []),
        __metadata("design:returntype", void 0)
    ], DropZoneColumnComp.prototype, "init", null);
    return DropZoneColumnComp;
}(ag_grid_community_1.Component));
exports.DropZoneColumnComp = DropZoneColumnComp;

filteredRowCount += 1;
            }
        });
        return filteredRowCount;
    };
    FilteredRowsComp.prototype.init = function () { };
    __decorate([
        ag_grid_community_1.Autowired('eventService'),
        __metadata("design:type", ag_grid_community_1.EventService)
    ], FilteredRowsComp.prototype, "eventService", void 0);
    __decorate([
        ag_grid_community_1.Autowired('gridApi'),
        __metadata("design:type", ag_grid_community_1.GridApi)
    ], FilteredRowsComp.prototype, "gridApi", void 0);
    __decorate([
        ag_grid_community_1.PostConstruct,
        __metadata("design:type", Function),
        __metadata("design:paramtypes", []),
        __metadata("design:returntype", void 0)
    ], FilteredRowsComp.prototype, "postConstruct", null);
    return FilteredRowsComp;
}(nameValueComp_1.NameValueComp));
exports.FilteredRowsComp = FilteredRowsComp;

var totalRowCount = 0;
        this.gridApi.forEachLeafNode(function (node) { return totalRowCount += 1; });
        return "" + totalRowCount;
    };
    TotalRowsComp.prototype.init = function () {
    };
    __decorate([
        ag_grid_community_1.Autowired('eventService'),
        __metadata("design:type", ag_grid_community_1.EventService)
    ], TotalRowsComp.prototype, "eventService", void 0);
    __decorate([
        ag_grid_community_1.Autowired('gridApi'),
        __metadata("design:type", ag_grid_community_1.GridApi)
    ], TotalRowsComp.prototype, "gridApi", void 0);
    __decorate([
        ag_grid_community_1.PostConstruct,
        __metadata("design:type", Function),
        __metadata("design:paramtypes", []),
        __metadata("design:returntype", void 0)
    ], TotalRowsComp.prototype, "postConstruct", null);
    return TotalRowsComp;
}(nameValueComp_1.NameValueComp));
exports.TotalRowsComp = TotalRowsComp;

root.append(bottomAxis);
        _this.updateColors(fills, strokes);
        return _this;
    }
    MiniBubble.prototype.init = function () {
        this.scene.canvas.element.title = this.chartTranslator.translate('bubbleTooltip');
    };
    MiniBubble.prototype.updateColors = function (fills, strokes) {
        this.points.forEach(function (line, i) {
            line.stroke = strokes[i % strokes.length];
            line.fill = fills[i % fills.length];
        });
    };
    MiniBubble.chartType = ag_grid_community_1.ChartType.Bubble;
    __decorate([
        ag_grid_community_1.PostConstruct,
        __metadata("design:type", Function),
        __metadata("design:paramtypes", []),
        __metadata("design:returntype", void 0)
    ], MiniBubble.prototype, "init", null);
    return MiniBubble;
}(MiniChart));
var MiniArea = /** @class */ (function (_super) {

this.activePanels.forEach(function (panel) {
            ag_grid_community_1._.removeFromParent(panel.getGui());
            panel.destroy();
        });
    };
    ChartFormattingPanel.prototype.destroy = function () {
        this.destroyActivePanels();
        _super.prototype.destroy.call(this);
    };
    ChartFormattingPanel.TEMPLATE = "<div class="\&quot;ag-chart-format-wrapper\&quot;"></div>";
    __decorate([
        ag_grid_community_1.RefSelector('formatPanelWrapper'),
        __metadata("design:type", HTMLElement)
    ], ChartFormattingPanel.prototype, "formatPanelWrapper", void 0);
    __decorate([
        ag_grid_community_1.PostConstruct,
        __metadata("design:type", Function),
        __metadata("design:paramtypes", []),
        __metadata("design:returntype", void 0)
    ], ChartFormattingPanel.prototype, "init", null);
    return ChartFormattingPanel;
}(ag_grid_community_1.Component));
exports.ChartFormattingPanel = ChartFormattingPanel;

});
    };
    VirtualList.prototype.setModel = function (model) {
        this.model = model;
    };
    VirtualList.TEMPLATE = "<div class="\&quot;ag-virtual-list-viewport\&quot;">\n            <div class="\&quot;ag-virtual-list-container\&quot;"></div>\n        </div>";
    __decorate([
        ag_grid_community_1.Autowired('environment'),
        __metadata("design:type", ag_grid_community_1.Environment)
    ], VirtualList.prototype, "environment", void 0);
    __decorate([
        ag_grid_community_1.Autowired('gridOptionsWrapper'),
        __metadata("design:type", ag_grid_community_1.GridOptionsWrapper)
    ], VirtualList.prototype, "gridOptionsWrapper", void 0);
    __decorate([
        ag_grid_community_1.PostConstruct,
        __metadata("design:type", Function),
        __metadata("design:paramtypes", []),
        __metadata("design:returntype", void 0)
    ], VirtualList.prototype, "init", null);
    return VirtualList;
}(ag_grid_community_1.Component));
exports.VirtualList = VirtualList;

__metadata("design:type", ag_grid_community_1.GridOptionsWrapper)
    ], ContextMenuFactory.prototype, "gridOptionsWrapper", void 0);
    __decorate([
        ag_grid_community_1.Autowired('rowModel'),
        __metadata("design:type", Object)
    ], ContextMenuFactory.prototype, "rowModel", void 0);
    __decorate([
        ag_grid_community_1.Autowired('rangeController'),
        __metadata("design:type", rangeController_1.RangeController)
    ], ContextMenuFactory.prototype, "rangeController", void 0);
    __decorate([
        ag_grid_community_1.Autowired('columnController'),
        __metadata("design:type", ag_grid_community_1.ColumnController)
    ], ContextMenuFactory.prototype, "columnController", void 0);
    __decorate([
        ag_grid_community_1.PostConstruct,
        __metadata("design:type", Function),
        __metadata("design:paramtypes", []),
        __metadata("design:returntype", void 0)
    ], ContextMenuFactory.prototype, "init", null);
    ContextMenuFactory = __decorate([
        ag_grid_community_1.Bean('contextMenuFactory')
    ], ContextMenuFactory);
    return ContextMenuFactory;
}());
exports.ContextMenuFactory = ContextMenuFactory;

__metadata("design:type", ag_grid_community_1.GridOptionsWrapper)
    ], EnterpriseMenu.prototype, "gridOptionsWrapper", void 0);
    __decorate([
        ag_grid_community_1.Autowired('eventService'),
        __metadata("design:type", ag_grid_community_1.EventService)
    ], EnterpriseMenu.prototype, "eventService", void 0);
    __decorate([
        ag_grid_community_1.Autowired('menuItemMapper'),
        __metadata("design:type", menuItemMapper_1.MenuItemMapper)
    ], EnterpriseMenu.prototype, "menuItemMapper", void 0);
    __decorate([
        ag_grid_community_1.Autowired('rowModel'),
        __metadata("design:type", Object)
    ], EnterpriseMenu.prototype, "rowModel", void 0);
    __decorate([
        ag_grid_community_1.PostConstruct,
        __metadata("design:type", Function),
        __metadata("design:paramtypes", []),
        __metadata("design:returntype", void 0)
    ], EnterpriseMenu.prototype, "init", null);
    return EnterpriseMenu;
}(ag_grid_community_1.BeanStub));
exports.EnterpriseMenu = EnterpriseMenu;

__decorate([
        ag_grid_community_1.Autowired('eventService'),
        __metadata("design:type", ag_grid_community_1.EventService)
    ], ServerSideCache.prototype, "eventService", void 0);
    __decorate([
        ag_grid_community_1.Autowired('gridOptionsWrapper'),
        __metadata("design:type", ag_grid_community_1.GridOptionsWrapper)
    ], ServerSideCache.prototype, "gridOptionsWrapper", void 0);
    __decorate([
        __param(0, ag_grid_community_1.Qualifier('loggerFactory')),
        __metadata("design:type", Function),
        __metadata("design:paramtypes", [ag_grid_community_1.LoggerFactory]),
        __metadata("design:returntype", void 0)
    ], ServerSideCache.prototype, "setBeans", null);
    __decorate([
        ag_grid_community_1.PostConstruct,
        __metadata("design:type", Function),
        __metadata("design:paramtypes", []),
        __metadata("design:returntype", void 0)
    ], ServerSideCache.prototype, "init", null);
    return ServerSideCache;
}(ag_grid_community_1.RowNodeCache));
exports.ServerSideCache = ServerSideCache;

__metadata("design:type", ag_grid_community_1.AgSlider)
    ], AreaSeriesPanel.prototype, "seriesLineWidthSlider", void 0);
    __decorate([
        ag_grid_community_1.RefSelector('seriesLineOpacitySlider'),
        __metadata("design:type", ag_grid_community_1.AgSlider)
    ], AreaSeriesPanel.prototype, "seriesLineOpacitySlider", void 0);
    __decorate([
        ag_grid_community_1.RefSelector('seriesFillOpacitySlider'),
        __metadata("design:type", ag_grid_community_1.AgSlider)
    ], AreaSeriesPanel.prototype, "seriesFillOpacitySlider", void 0);
    __decorate([
        ag_grid_community_1.Autowired('chartTranslator'),
        __metadata("design:type", chartTranslator_1.ChartTranslator)
    ], AreaSeriesPanel.prototype, "chartTranslator", void 0);
    __decorate([
        ag_grid_community_1.PostConstruct,
        __metadata("design:type", Function),
        __metadata("design:paramtypes", []),
        __metadata("design:returntype", void 0)
    ], AreaSeriesPanel.prototype, "init", null);
    return AreaSeriesPanel;
}(ag_grid_community_1.Component));
exports.AreaSeriesPanel = AreaSeriesPanel;