chore(*): Apply review comments.

Author: MKirova

projects/igniteui-angular/src/lib/grids/common/events.ts

@@ -126,13 +126,13 @@ export interface IPinRowEventArgs extends IBaseEventArgs {
     /** The row component instance, that was pinned/unpinned.
     * May be undefined if row does not exist in the current visible data.
     */
-    row?: IgxRowDirective<IgxGridBaseDirective & GridType>;
+    readonly row?: IgxRowDirective<IgxGridBaseDirective & GridType>;
     /** The ID of the row, that was pinned/unpinned.
     *   ID is either the primaryKey value or the data record instance.
     */
-    rowID: any;
+    readonly rowID: any;
     /** The index at which to pin the row in the pinned rows collection. */
     insertAtIndex?: number;
     /** Whether or noy the row is pinned or unpinned. */
-    isPinned: boolean;
+    readonly isPinned: boolean;
 }

projects/igniteui-angular/src/lib/grids/grid-base.directive.ts

@@ -2464,8 +2464,11 @@ export class IgxGridBaseDirective extends DisplayDensityBase implements
     /**
      * @hidden
     */
-    public pinnedRecords = [];
+    public get pinnedRecords() {
+        return this._pinnedRecords;
+    }
 
+    protected _pinnedRecords = [];
 
     /**
      * @hidden
@@ -3289,6 +3292,17 @@ export class IgxGridBaseDirective extends DisplayDensityBase implements
         return this._pinnedVisible;
     }
 
+    /**
+     * Gets an array of the pinned `IgxRowComponent`s.
+     * @example
+     * ```typescript
+     * const pinnedRow = this.grid.pinnedRows;
+     * ```
+     */
+    get pinnedRows(): IgxGridRowComponent[] {
+        return this.rowList.filter(x => x.pinned);
+    }
+
     /**
      * Gets an array of unpinned `IgxColumnComponent`s.
      * @example

projects/igniteui-angular/src/lib/grids/grid/grid.component.html

@@ -110,7 +110,6 @@
             class="igx-grid__scroll-on-drag-pinned" [style.left.px]="pinnedWidth"></span>
         <ng-template #pinnedRecordsTemplate>
             <ng-container *ngFor="let rowData of pinnedRecords
-                | gridTransaction:id:pipeTrigger
                 | visibleColumns:hasVisibleColumns
                 | gridFiltering:filteringExpressionsTree:filterStrategy:advancedFilteringExpressionsTree:id:pipeTrigger:filteringPipeTrigger
                 | gridSort:sortingExpressions:sortStrategy:id:pipeTrigger