Cfg : module {	PATH : con "/dis/lib/cfg.dis"; 	Attr : adt {		name : string;		value : string;	}; 	Tuple : adt {		lnum : int;		attrs : list of Attr;		lookup: fn (t : self ref Tuple, name : string) : string;	}; 	Record : adt {		tuples : list of ref Tuple;		lookup : fn (r : self ref Record, name : string) : (string, ref Tuple);	}; 	init : fn (path : string) : string;	reset:	fn();	lookup : fn (name : string) : list of (string, ref Record);	getkeys : fn () : list of string;	parseline:	fn(s: string, lno: int): (ref Tuple, string);};