code: public List<IGeneratorParameter<?>> getRenderingParameters() {
          List<IGeneratorParameter<?>> parameters = new ArrayList<IGeneratorParameter<?>>();
          parameters.addAll(renderingParameters.values());
          return parameters;
      }
docs: Returns all {@link IGeneratorParameter}s for the current
  {@link RendererModel}.
  
  @return a new List with {@link IGeneratorParameter}s