public function part($offset)
    {
        if (! isset($this->identifierParts[$offset])) {
            return null;
        }

        return $this->identifierParts[$offset];
    }
public function part($offset)
    {
        if (! isset($this->identifierParts[$offset])) {
            return null;
        }

        return $this->identifierParts[$offset];
    }
public function part ( $ offset ) { if ( ! isset ( $ this -> identifierParts [ $ offset ] ) ) { return null ; } return $ this -> identifierParts [ $ offset ] ; }
Get the value of the identifier part at the specified offset

@param int $offset The index of the identifier part to retrieve, starting
from zero

@return string|null The name of the corresponding identifier part, or
NULL if a part doesn't exist at the specified offset
Get the value of the identifier part at the specified offset