Method clear

src/cdk/collections/selection-model.ts:114–121

* Clears all of the selected values. * @param flushEvent Whether to flush the changes in an event. * If false, the changes to the selection will be flushed along with the next event. * @return Whether the selection changed as a result of this call

(flushEvent = true)

   * @return Whether the selection changed as a result of this call
   */
  clear(flushEvent = true): boolean {
    this._unmarkAll();
    const changed = this._hasQueuedChanges();
    if (flushEvent) {
      this._emitChangeEvent();
    }
    return changed;
  }

  /**
   * Determines whether a value is selected.