AddMixins mix:one to /thePath1
AddMixins mix:one,mix:two to /thePath1,/thePath2
AddMixins mix:three,mix:four to /thePath3,/thePath4
RemoveMixins mix:one from /thePath1
RemoveMixins mix:one,mix:two from /thePath1,/thePath2
RemoveMixins mix:three,mix:four from /thePath3,/thePath4