docs: public GetUserDefinedFunctionsResult withUserDefinedFunctions(UserDefinedFunction... userDefinedFunctions) {
          if (this.userDefinedFunctions == null) {
              setUserDefinedFunctions(new java.util.ArrayList<UserDefinedFunction>(userDefinedFunctions.length));
          }
          for (UserDefinedFunction ele : userDefinedFunctions) {
              this.userDefinedFunctions.add(ele);
          }
          return this;
      }