GateTreeError when loading a FlowJo workspace with "." gate name

[whitews]

Parsing a FlowJo workspace with a gate named either "." or ".." results in the following error:

...flowkit/_models/gate_node.py", line 46, in add_custom_gate raise GateTreeError( flowkit.exceptions.GateTreeError: Custom gate must match the template gate type...

After investigating, this is caused by the anytree library's Resolver.get() method using pattern matching for certain strings. I have an open issue with anytree (see c0fec0de/anytree#269).

The resolution is either to update anytree's Resolver.get() method to allow matching strict node name/paths or for FlowKit to issue an error for certain gate names with a clearer message indicating what the issue is. The latter is problematic because FlowJo allows gate names like "." and "..".