let()=Warnings.(issue_warning(Config(Bad_group(fullname,["signatures";"name"],s,j,"A json object string was expected","Skipping this signature name"))))in
let()=Warnings.(issue_warning(Config(Bad_group(fullname,["signatures"],s,j,"A json object with fields \"name\" and \"engine\" was expected","Skipping this signature name/engine association"))))in
let()=Warnings.(issue_warning(Config(Bad_group(fullname,[],s,j,"A json object with fields \"signatures\" and \"colors\" was expected","Using default signature to engine mapping"))))in