public function nameAtomAt($index)
    {
        $atom = $this->nameAtomAtDefault($index);
        if (null === $atom) {
            throw new Exception\UndefinedAtomException($index);
        }

        return $atom;
    }
public function nameAtomAt($index)
    {
        $atom = $this->nameAtomAtDefault($index);
        if (null === $atom) {
            throw new Exception\UndefinedAtomException($index);
        }

        return $atom;
    }
public function nameAtomAt ( $ index ) { $ atom = $ this -> nameAtomAtDefault ( $ index ) ; if ( null === $ atom ) { throw new Exception \ UndefinedAtomException ( $ index ) ; } return $ atom ; }
Get a single path name atom by index.

@param integer $index The index to search for.

@return string                           The path name atom.
@throws Exception\UndefinedAtomException If the index does not exist in this path's name atoms.
Get a single path name atom by index .