    # File bin/el4r-instance, line 588
        def el4r_rubyproc_to_lambda(attrs = nil, &block)
          forms =
            ["el4r-lambda-for-rubyproc \"#{el4r_rubyobj_stock.obj2id(block)}\""]
          if attrs
            docstring = attrs[:docstring]
            forms << el4r_ruby2lisp(docstring) if docstring
            interactive = attrs[:interactive]
            if interactive
              case interactive
              when true; forms << "'(interactive)"
              else; forms << "'(interactive #{el4r_ruby2lisp(interactive)})"
              end
            end
          end
          "(#{forms.join(' ')})"
        end