code: public function getType($data_type = 'metadata', $type = 'text') {
  		if (isset($this->types[$data_type][$type])) {
  			return $this->types[$data_type][$type];
  		}
  		return false;
  	}
docs: Returns a handler classname
  
  @param string $data_type Registered data type
  @param string $type      Registered input type
  @return boolean|array