abstract Object_Impl extends Base {
   [[Object Impl  @since 1.66]]
   methods {
      @property a @beta {
         set {
            values {
                value: const(list<string>);
            }
            return: bool (false);
         }
         get {
         }
         keys {
            part: string;
         }
         values {
            value: list<string> @move;
         }
      }
      @property b {
         set {
         }
         get @pure_virtual {
            /* set as virtual pure - no implementation expected */
         }
         values {
            value: iterator<string> @move;
         }
      }
      constructor_1 {
         params {
            @in a: int;
            @in b: char;
         }
      }
      constructor_2 {
      }
      foo1 {
         [[comment foo]]
         params {
            @in a: int; [[a]]
            @inout b: char;
            @out c: double;
         }
         return: mstring (null); [[comment for method return]]
      }
      foo2 @const {
         [[comment foo]]
         params {
            @in a: int;
            @in b: string;
         }
      }
      pure_foo3 @pure_virtual {
         /* set as virtual pure - no implementation expected */
      }
   }
   implements {
      class.constructor;
      class.destructor;
      Base.constructor;
      Base.destructor;
   }
   constructors {
      .constructor_1;
      .constructor_2;
   }
}