Method _cleanupCachedDimensions

src/cdk/drag-drop/drag-ref.ts:1437–1440

Cleans up any cached element dimensions that we don't need after dragging has stopped.

()

  /** Cleans up any cached element dimensions that we don't need after dragging has stopped. */
  private _cleanupCachedDimensions() {
    this._boundaryRect = this._previewRect = undefined;
    this._parentPositions.clear();
  }

  /**
   * Checks whether the element is still inside its boundary after the viewport has been resized.