src/common/ast-path.js/AstPath/callParent
class AstPath:  callParent(callback, count = 0) {
    const stackIndex = getNodeStackIndexHelper(this.stack, count + 1);
    const parentValues = this.stack.splice(stackIndex + 1);
    const result = callback(this);
    this.stack.push(...parentValues);
    return result;
  }