public function is($condition, $field) {
		if (!isset($this->_fields[$field])) {
			return null;
		}
		return isset($this->_fields[$field][$condition]) && $this->_fields[$field][$condition];
	}
public function is($condition, $field) {
		if (!isset($this->_fields[$field])) {
			return null;
		}
		return isset($this->_fields[$field][$condition]) && $this->_fields[$field][$condition];
	}
public function is ( $ condition , $ field ) { if ( ! isset ( $ this -> _fields [ $ field ] ) ) { return null ; } return isset ( $ this -> _fields [ $ field ] [ $ condition ] ) && $ this -> _fields [ $ field ] [ $ condition ] ; }
Detects properties of a field, i.e. if it supports arrays.

@param string $condition
@param string $field
@return boolean
Detects properties of a field i . e . if it supports arrays .