code: public function fill(array $attributes)
      {
          if ($this->getFieldManager()) {
              $attributes = $this->getFieldManager()->transformToResource($attributes);
          }
          
          return parent::fill($attributes);
      }
docs: Fill the model with an array of attributes.
  
  @param array $attributes
  @return $this
  
  @throws \Illuminate\Database\Eloquent\MassAssignmentException