code: public function getTypes()
      {
          if (is_string($this->type)) {
              $types = array($this->type);
          } elseif (is_array($this->type)) {
              $types = $this->type;
          } else {
              $types =  array();
          }
  
          $types = array_filter($types, array($this, 'isValidType'));
  
          return empty($types) ? array(self::ANY) : $types;
      }
docs: Returns the configured types.
  
  @return array