anchor.diff:      end
   %>
         if( null != callback ) callback.onSuccess( <%= result_string %> );
  -      if( null != _callback ) _callback.onSuccess( result );
  +      _callback.onSuccess( result );
       }
     });
     }
  
positive.code:   @javax.inject.Inject
    private org.realityforge.replicant.client.EntityRepository _repository;
    @javax.inject.Named("GLOBAL")
    @com.google.inject.Inject( optional = true )
    @javax.annotation.Nullable
    private com.google.gwt.user.client.rpc.AsyncCallback _callback;
  
  <% service.methods.each do |method|
  
negative.code:     public void onFailure( final Throwable caught )
      {
        if( null != callback ) callback.onFailure( caught );
        _callback.onFailure( caught );
      }
  
      public void onSuccess( final <%= method.return_value.imit.non_primitive_java_type(:transport) %> result )
  