( (HashMap) collection ).put( object, object );
( (Map) collection ).put( object, object );
            public Object add( Object collection, Object object ) {                if ( collection == null ) {                    collection = new HashMap();                    ( (HashMap) collection ).put( object, object );                    return collection;                } else {                    ( (HashMap) collection ).put( object, object );                    return null;                }            }