array_values($this->tokens->getTokensInLocation('box')),
                array_values($this->tokens->getTokensInLocation('offtable')),

            var duration = 500;

            // Two standard locations that mean: "remove from UI": offtable, box
            if (target_id == 'box' || target_id == 'offtable') {
                if ($(key)) this.fadeOutAndDestroy(key, duration, delay);
                return;
            }

                var duration = 500;

            // TODO: remove cubes + investigators; but put discs in proper places