type flag.boolFlag3 uses
flag (current package)
flag.go#L150: type boolFlag interface {
flag.go#L586: case boolFlag:
flag.go#L1118: if fv, ok := flag.Value.(boolFlag); ok && fv.IsBoolFlag() { // special case: doesn't need an arg
The pages are generated with Goldsv0.7.6. (GOOS=linux GOARCH=amd64)