code: public function getValidators()
      {
          if ($this->_validators === null) {
              $this->_validators = $this->createValidators();
          }
  
          return $this->_validators;
      }
docs: Returns all the validators declared in [[rules()]].
  
  This method differs from [[getActiveValidators()]] in that the latter
  only returns the validators applicable to the current [[scenario]].
  
  Because this method returns an ArrayObject object, you may
  manipulate it by inserting or removing validators (useful in model behaviors).
  For example,
  
  ```php
  $model->validators[] = $newValidator;
  ```
  
  @return ArrayObject|\yii\validators\Validator[] all the validators declared in the model.