This is not great, but it's a start (and unblocks other pull-throughs).
New changes:
c401efc98 build: Replace jsduck with jsdoc for documentation
16ba162a0 JSDoc: @mixins -> @mixes
9e0a1f53b JSDoc: Fix complex return types
449b6cc0f Prefer arrow function callbacks
1539af2c8 Remove 'this' bindings in arrow functions
b760f3b14 Use arrow functions in OO.ui.Process steps
57c24109e Use arrow functions in jQuery callbacks
9622ccef9 Convert some remaining functions callbacks to arrow functions
f6c885021 Remove useless local variable
1cd800020 Clear branch node cache when rebuilding tree
Bug: T250843
Bug: T363329
Change-Id: I0f4878ca84b95e3f388b358b943f105637e455f9
