Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
CHECK: {"branches":[],"expansions": CHECK: "filenames":["{{[^"]+}}showExpansions.cpp", CHECK: "source_region":[24,5,24,17,100,0,1,1], CHECK: "filename":"{{[^"]+}}showExpansions.cpp",