Function findFirstChildIndex

findFirstChildIndex<T>(
    flatNodes: readonly Readonly<
        {
            ancestorIsLast: readonly boolean[];
            depth: number;
            hasChildren: boolean;
            key: string;
            node: T;
            parentKey: string
            | null;
            siblingCount: number;
            siblingIndex: number;
        },
    >[],
    currentIndex: number,
): number
Find the first child node in the flattened list.
Type Parameters
- T
Parameters
- flatNodes: readonly Readonly<
      {
          ancestorIsLast: readonly boolean[];
          depth: number;
          hasChildren: boolean;
          key: string;
          node: T;
          parentKey: string
          | null;
          siblingCount: number;
          siblingIndex: number;
      },
  >[]
  Flattened node list
- currentIndex: number
  Current node index
Returns number
First child index or -1 if no children visible
- Defined in core/src/widgets/tree.ts:252