public function get($field,$format='') {
      if ($format) {
         if (is_array(@$this->fails["messages"])) {
            foreach ($this->fails["messages"] as $field => $value) {
               $this->fails["messages"][$field] = array_map(function ($v) use ($format) {return str_replace(':message', $v, $format);}, $value);
            }
         }
      }
      return count(@$this->fails["messages"][$field])?@$this->fails["messages"][$field]:array();
   }