Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
{ 'version': 0, 'roots': [ { 'name': 'DIR', 'type': 'directory', 'contents': [ { 'name': 'not_real.h', 'type': 'file', 'external-contents': 'DIR/Inputs/header.h' } ] } ] }