specify $start and $end nodes for Paths using Node identifier

[Mulkave]

One thing that would be really helpful here if we could be able to add the label identifier as well. i.e.

$start = ['label' => 'User', 'id' => 123];
$end = ['label' => 'Phone', 'id' => 987];
$paths = $client->getPathBetween($start, $end);