Eliminate bunch of pass-through methods in Js::Ast.

        exp = ast.expression_statement? ? ast["expression"] : nil

        var = ast.variable_declaration? ? ast["declarations"][0] : nil

        if doc = detect_class(ast, exp, var)

        if doc = Js::Class.detect(ast, exp, var, @docs)

          doc

        elsif doc = detect_method(ast, exp, var)

        elsif doc = Js::Method.detect(ast, exp, var)

          doc

        elsif doc = detect_event(ast, exp, var)

        elsif doc = Js::Event.detect(ast, exp, var)

          doc

        elsif doc = detect_property(ast, exp, var)

        elsif doc = Js::Property.detect(ast, exp, var)

          doc

        else

          Js::Property.make()

        end

      end

      private

      def detect_class(ast, exp, var)

        Js::Class.detect(ast, exp, var, @docs)

      end

      def detect_method(ast, exp, var)

        Js::Method.detect(ast, exp, var)

      end

      def detect_event(ast, exp, var)

        Js::Event.detect(ast, exp, var)

      end

      def detect_property(ast, exp, var)

        Js::Property.detect(ast, exp, var)

      end

    end

  end