Restore utils stuff, is still useful for testing Collection in isolation
Restore utils stuff, is still useful for testing Collection in isolation

frol/invoke,kejbaly2/invoke,mkusz/invoke,pyinvoke/invoke,mattrobenolt/invoke,kejbaly2/invoke,frol/invoke,pyinvoke/invoke,mkusz/invoke,tyewang/invoke,pfmoore/invoke,mattrobenolt/invoke,sophacles/invoke,pfmoore/invoke,singingwolfboy/invoke