Function insertChild

packages/designer/src/document/node/node.ts:1481–1504

(
  container: INode,
  thing: INode | IPublicTypeNodeData,
  at?: number | null,
  copy?: boolean,
)

}

export function insertChild(
  container: INode,
  thing: INode | IPublicTypeNodeData,
  at?: number | null,
  copy?: boolean,
): INode | null {
  let node: INode | null | IRootNode | undefined;
  let nodeSchema: IPublicTypeNodeSchema;
  if (isNode<INode>(thing) && (copy || thing.isSlot())) {
    nodeSchema = thing.export(IPublicEnumTransformStage.Clone);
    node = container.document?.createNode(nodeSchema);
  } else if (isNode<INode>(thing)) {
    node = thing;
  } else if (isNodeSchema(thing)) {
    node = container.document?.createNode(thing);
  }

  if (isNode<INode>(node)) {
    container.children?.insert(node, at);
    return node;
  }

  return null;
}

export function insertChildren(
  container: INode,