Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
objc-general.m:__13+[A foreach:]_block_invoke 42129 2 2 1 objc-general.m:+[A foreach:] 401 2 1 2 main 24 1 1 consecutive_objc_for_ranges 1642897 3 0 0 0 nested_objc_for_ranges 1598545 3 0 0 0