/**
* create a new Vertex in this Graph from the given input Vertex of another graph
*
* @param Vertex $originalVertex
* @return Vertex new vertex in this graph
* @throws RuntimeException if vertex with this ID already exists
*/
public function createVertexClone(Vertex $originalVertex)
{
$id = $originalVertex->getId();
if ($this->vertices->hasVertexId($id)) {
throw new RuntimeException('Id of cloned vertex already exists');
}
$newVertex = new Vertex($this, $id);
// TODO: properly set attributes of vertex
$newVertex->setLayout($originalVertex->getLayout());
$newVertex->setBalance($originalVertex->getBalance());
$newVertex->setGroup($originalVertex->getGroup());
return $newVertex;
}