ref: db0eab9ca04b896e5760081efd854c57f65f36c3
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);
};