Copy all join node fields from the override self._inputs to the base self._interface.inputs.
Add a better node slot field accessor error message.
Clarify a comment.
Copy all join node fields from the override self._inputs to the base self._interface.inputs.
Add a better node slot field accessor error message.
Clarify a comment.
Add a test for multiple join nodes.
The join node loop current node variable is jnode, not dest.
Merge branch 'join_itersource_synchronize'