public function noAtomInside($atom)
{
$gremlin = 'where( __.repeat( out(' . $this->linksDown . ') ).emit( hasLabel(' . $this->SorA($atom) . ') ).times(' . self::MAX_LOOPING . ').hasLabel(' . $this->SorA($atom) . ').count().is(eq(0)) )';
$this->addMethod($gremlin);
return $this;
}