var go/build.goBuildComment

3 uses

	go/build (current package)
		build.go#L1463: 	goBuildComment = []byte("//go:build")
		build.go#L1470: 	if !bytes.HasPrefix(line, goBuildComment) {
		build.go#L1474: 	rest := line[len(goBuildComment):]

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