G'MIC 2.9.9: Specialization of `+custom_command`

[David_Tschumperle (G'MIC staff)]

@Reptorian

++command is not possible if one wants to add another image. Would another symbol work? I believe ~command would work instead of +command. Or is there something I’m missing?

I don’t understand what you try to do with your ++command.
Having a +command specialization does not mean you can invoke it with ++command.