Gimp.PixPipeParams const Gimp = imports.gi.Gimp; let pixPipeParams = new Gimp.PixPipeParams({ step: value ncells: value dim: value cols: value rows: value cellwidth: value cellheight: value rank: value selection: value }); PLease somebody help documenting this. Fields cellheight cellwidth cols dim ncells placement rank rows selection step More Information Gimp