def find_controller_by(params)
      model_class = find_model_class_by params
      Map.controller_map(model_class, params[:resources_controller]) || default_controller(params)
    end
def find_controller_by(params)
      model_class = find_model_class_by params
      Map.controller_map(model_class, params[:resources_controller]) || default_controller(params)
    end
Find controller class
 @param params [Hash]
 @return [Class] controller class