Shortcut key for 'close other tabs' in tab group

Use case or problem

Close all other tabs in a tab group - not all other tabs in all tab groups - without using the mouse.

Right clicking on a tab in a tab group with more than one tab open has the option to ‘close others’ which closes all the other tabs in the tab group, but there is no shortcut key. It would be really handy to have a shortcut key for this like the ‘close all other tabs’ but limited to the active tab group.