Method _getNodeChildren

src/cdk/tree/tree.ts:871–884

Given a CdkTreeNode, gets the nodes that renders that node's child data.

(node: CdkTreeNode<T, K>)

  /** Given a CdkTreeNode, gets the nodes that renders that node's child data. */
  _getNodeChildren(node: CdkTreeNode<T, K>) {
    return this._getDirectChildren(node.data).pipe(
      map(children =>
        children.reduce<CdkTreeNode<T, K>[]>((nodes, child) => {
          const value = this._nodes.value.get(this._getExpansionKey(child));
          if (value) {
            nodes.push(value);
          }

          return nodes;
        }, []),
      ),
    );
  }

  /** `keydown` event handler; this just passes the event to the `TreeKeyManager`. */
  protected _sendKeydownToKeyManager(event: KeyboardEvent): void {