if r.Mod.Path == path {
			r.Syntax.markRemoved()
			*r = Require{}
		}
	}
	return nil
}

// AddExclude adds a exclude statement to the mod file. Errors if the provided
// version is not a canonical version string
func (f *File) AddExclude(path, vers string) error {
	if err := checkCanonicalVersion(path, vers); err != nil {
		return err
	}

	var hint *Line