sample/frontend/src/app/section-grid/section-grid.component.html [42:60]:
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        <ng-container [ngSwitch]="index">
          <ng-container *ngSwitchCase="0">
            <agr-grid-section-header
              [title]="column.columnDef.title"
              [collapsible]="column.columnDef.collapsible"
              [collapsed]="column.columnDef.collapsed"
              [pin]="column.columnDef.pin"
              [pinned]="column.columnDef.pinned"
              (collapse)="toggleCollapse(column)"
              (pinChange)="togglePin(column)">
            </agr-grid-section-header>
          </ng-container>
          <ng-container *ngSwitchDefault>
            <p-checkbox *ngIf="column.columnDef.field=='checkbox';else default"
                        [binary]="true"
                        [ngModel]="grid.gridEngine.selectedAll"
                        (ngModelChange)="grid.gridEngine.toggleSelectAll()"></p-checkbox>
            <ng-template #default>
              <agr-grid-header [column]="column"></agr-grid-header>
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sample/frontend/src/app/section-grid/section-grid.component.html [78:96]:
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        <ng-container [ngSwitch]="index">
          <ng-container *ngSwitchCase="0">
            <agr-grid-section-header
              [title]="column.columnDef.title"
              [collapsible]="column.columnDef.collapsible"
              [collapsed]="column.columnDef.collapsed"
              [pin]="column.columnDef.pin"
              [pinned]="column.columnDef.pinned"
              (collapse)="toggleCollapse(column)"
              (pinChange)="togglePin(column)">
            </agr-grid-section-header>
          </ng-container>
          <ng-container *ngSwitchDefault>
            <p-checkbox *ngIf="column.columnDef.field=='checkbox';else default"
                        [binary]="true"
                        [ngModel]="grid.gridEngine.selectedAll"
                        (ngModelChange)="grid.gridEngine.toggleSelectAll()"></p-checkbox>
            <ng-template #default>
              <agr-grid-header [column]="column"></agr-grid-header>
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