code: function _isList(gqlTye) {
    if (gqlTye instanceof GraphQLList) {
      return true;
    }
  
    if (gqlTye instanceof GraphQLNonNull) {
      return _isList(gqlTye.ofType);
    }
  
    return false;
  }
docs: Determine if the GQL node is a list
  @param gqlTye
  @returns {*}
  @private