public function isEmpty () 
    {
        return parent::isEmpty() && Helper::every($this->_records, function (Record $record) { return $record->isEmpty(); });
    }
public function isEmpty () 
    {
        return parent::isEmpty() && Helper::every($this->_records, function (Record $record) { return $record->isEmpty(); });
    }
public function isEmpty ( ) { return parent :: isEmpty ( ) && Helper :: every ( $ this -> _records , function ( Record $ record ) { return $ record -> isEmpty ( ) ; } ) ; }
Return true if the record is empty.

A nested record is empty iff it contains no fields and no non-empty
contained record.

@return boolean
Return true if the record is empty .