We need to modify the code of UI Elements Inspector which is an accessibility testing tool so that it would be possible to start and stop recording accessibility events using a shortcut key. This would enable faster debugging of accessibility issues because the event log will only have events concerning the action being debugged and not any other events regarding switching windows or moving the mouse in order to access the tool.
Additionally, it would be a good idea to have the ability to start the tool from the command-line and to record events to a log file.
Filtering accessibility events coming from a particular window would also be useful.

The source code of the tool is here:
https://developer.apple.com/library/content/samplecode/UIElementInspector/Introduction/Intro.html