MetaData cleared in vtkMRMLIGTLConnectorNode::PushNode

[FedericoGnesotto]

Hi,
I was wondering why all the metadata is cleared in vtkMRMLIGTLConnectorNode::PushNode(..) since this basically prevents any external client to set any metadata to the device before the node is pushed. For example, I would like to set the name of an image as metadata since the name of the device is capped to 20 chars.
Thanks for your answer,
Federico