whole_func_string: function(target, ev, callback, context) {
              var data = ev ? {
                  event: ev,
                  callback: callback,
                  target: target,
                  context: context
              } : target;
              manageEvent.call(this, 'on', data);
          }
func_code_string: function(target, ev, callback, context) {
              var data = ev ? {
                  event: ev,
                  callback: callback,
                  target: target,
                  context: context
              } : target;
              manageEvent.call(this, 'on', data);
          }
func_documentation_string: {event, callback, context, model}