Error reverting all changes to class in Iceberg commit window

[daniels220]

Bug description
If I have several changes to extension methods of a class, and try to revert all
'IceWorkingCopyPatcherVisitor does not understand #visitExtensionDefinition:'

To Reproduce
Steps to reproduce the behavior:

1. Make several changes to extension methods of the same class, in the same package.
2. Open a commit browser for the repo containing that package. The method changes are grouped under a single tree node for the class.
3. Right-click the class and choose Revert
4. See IceWorkingCopyPatcherVisitor does not understand #visitExtensionDefinition: error

Expected behavior
Revert all changes to extension methods in that class for that package (the nodes under it in the tree).

Version information:

• OS: Windows/any
• Pharo Version 11

Expected development cost
I imagine the solution is implementing the method in question and shouldn't be too difficult. I'm not familiar with Iceberg, so I'm probably not the best person to do this, but if it annoys me enough I might try.