ref: babf901b4a508c3ec5d1f89655f10377bbdf9637
dir: /appl/cmd/install/protocaller.m/
Protocaller : module{
init: fn(ctxt : ref Draw->Context, args : list of string);
protofile: fn(new : string, old : string, d : ref Sys->Dir);
WARN, ERROR, FATAL : con iota;
protoerr: fn(lev : int, line : int, err : string);
};