code: function(action, implementation){
              this.resolvableActions                      = this.resolvableActions                        || {};
              this.resolvableActions[action]              = this.resolvableActions[action]                || {};
              this.resolvableActions[action].actionName   = this.resolvableActions[action].actionName     || action;
  
              implementation = implementation || RL.ResolvableAction.Types[action];
              this.resolvableActions[action] = Object.create(implementation);
              // merge could be used instead of Object.create but is less desirable
              // RL.Util.merge(this.resolvableAction.Types[action], implementation);
  
              if(this.resolvableActions[action].init){
                  this.resolvableActions[action].init.call(this);
              }
          }
docs: Sets a resolvable action implementation on object.
  @method setResolvableAction
  @param {String} action - The action name.
  @param {ResolvableAction} [implementation] - Object to set as the action implementation.