warning: foo.proto:5:1: whole block
warning: foo.proto:5:1: nested blocks
warning: foo.proto:5:1: parallel blocks
warning: foo.proto:5:1: nested blocks same start
warning: foo.proto:5:1: nested blocks same end
warning: foo.proto:5:1: nested overlap
warning: foo.proto:5:15: nesting just the braces
warning: foo.proto:5:15: nesting just the braces same start
warning: foo.proto:5:15: nesting just the braces same start (2)
warning: foo.proto:5:15: braces nesting overlap
warning: foo.proto:7:17: braces nesting overlap (2)