[protobuf] Is it permitted for multiple files to have the same file path?

[Bingo Kang]

In google.golang.org/protobuf v1.28.1,  reflect/protoregistry/registry.go, 
comment says:

// It is permitted for multiple files to have the same file path.
func (r *Files) RegisterFile(file protoreflect.FileDescriptor) error {
  ...
}

But as the code says: 

path := file.Path()
if prev := r.filesByPath[path]; len(prev) > 0 {
  r.checkGenProtoConflict(path)
  err := errors.New("file %q is already registered", file.Path())
  err = amendErrorWithCaller(err, prev[0], file)
  if !(r == GlobalFiles && ignoreConflict(file, err)) {
    return err
  }
}

It seems that the code and the comment is not the same.
Please, anyone knows why?

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