Method expand

src/cdk/tree/tree.ts:1460–1464

Expands this data node. Implemented for TreeKeyManagerItem.

()

  /** Expands this data node. Implemented for TreeKeyManagerItem. */
  expand(): void {
    if (this.isExpandable) {
      this._tree.expand(this._data);
    }
  }

  /** Makes the node focusable. Implemented for TreeKeyManagerItem. */
  makeFocusable(): void {