Method _unmarkAll

src/cdk/collections/selection-model.ts:240–244

Clears out the selected values.

()

  /** Clears out the selected values. */
  private _unmarkAll() {
    if (!this.isEmpty()) {
      this._selection.forEach(value => this._unmarkSelected(value));
    }
  }

  /**
   * Verifies the value assignment and throws an error if the specified value array is