_isLastNodeInParent(node, parentNode) {
    if (parentNode && parentNode.body) {
      const lastNode = parentNode.body[parentNode.body.length - 1];
      return node === lastNode;
    }

    return false;
  }
judge node is last in parent.
@param {ASTNode} node - target node.
@param {ASTNode} parentNode - target parent node.
@returns {boolean} if true, the node is last in parent.
@private