func os.underlyingErrorIs

4 uses

	os (current package)
		error.go#L83: 	return underlyingErrorIs(err, ErrExist)
		error.go#L93: 	return underlyingErrorIs(err, ErrNotExist)
		error.go#L103: 	return underlyingErrorIs(err, ErrPermission)
		error.go#L119: func underlyingErrorIs(err, target error) bool {

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