I am not a fan of the context pattern either, however one can support it without need to explicitly define that support. var fs fs.Fs fs = somefs.New()

I am not a fan of the context pattern either, however one can support it without need to explicitly define that support. var fs fs.Fs fs = somefs.New() fs = contextfs.New(context.TODO(), fs) fs is now an fs with an imbedded context.