anchor.diff:  
     attach();
   
  -  createEntity({Entity newEnt, Map<String, dynamic> params}) {
  +  createEntity({Entity newEnt, Map<String, dynamic> params: const{}}) {
       super.createEntity(params: {'offer': this._offerId});
     }
   }
  
positive.code:     return false;
    }
  
    createEntity({var newEnt, Map<String, dynamic> params}) async{
      this.statusservice.setStatusToLoading();
      if (newEnt == null) {
        newEnt = this.cEnt();
  
negative.code:     return new Employee();
    }
  
    createEntity({var newEnt, Map<String, dynamic> params: const{}}) async{
      super.createEntity(params: {
        'username': 'newuser',
        'email': 'user@example.com',
  