Method insertBefore

packages/designer/src/document/node/node.ts:1129–1132

(node: INode, ref?: INode, useMutator = true)

  }

  insertBefore(node: INode, ref?: INode, useMutator = true) {
    const nodeInstance = ensureNode(node, this.document);
    this.children?.internalInsert(nodeInstance, ref ? ref.index : null, useMutator);
  }

  insertAfter(node: any, ref?: INode, useMutator = true) {
    const nodeInstance = ensureNode(node, this.document);