Method deselect

src/cdk-experimental/selection/selection-set.ts:86–105

(...selects: SelectableWithIndex<T>[])

  }

  deselect(...selects: SelectableWithIndex<T>[]) {
    if (!this._multiple && selects.length > 1 && (typeof ngDevMode === 'undefined' || ngDevMode)) {
      throw Error('SelectionSet: not multiple selection');
    }

    const before = this._getCurrentSelection();
    const toDeselect: SelectableWithIndex<T>[] = [];

    for (const select of selects) {
      if (!this.isSelected(select)) {
        continue;
      }

      toDeselect.push(select);
      this._markDeselected(this._getTrackedByValue(select));
    }

    const after = this._getCurrentSelection();
    this.changed.next({before, after});
  }

  private _markSelected(key: T | ReturnType<TrackByFunction<T>>, toSelect: SelectableWithIndex<T>) {
    this._selectionMap.set(key, toSelect);