Guideway for guiding a sliding door member

A guideway for receiving and guiding a carriage, the guideway comprising:

• a guideway body, the guideway body having a first longitudinal end and a second longitudinal end, the guideway body comprising:
• a longitudinally extending clear channel which is bordered by a wall of the guideway body, wherein the longitudinally extending clear channel opens at the first longitudinal end of the guideway body;
• and
• a stop member terminating the guideway at the first longitudinal end of the guideway body, the stop member comprising a crossbar and two legs extending from the crossbar, the crossbar extending transverse to a longitudinal direction of the clear channel and the legs extending transverse to the longitudinal direction of the clear channel and transverse to the crossbar and the legs having a clearance between the two legs, whereby the stop member forms a frame enclosing a window, wherein the stop member has an opening on an edge of the window transversely opposite the crossbar, thereby defining an open side of the stop member;
• wherein the stop member is displaceable on the guideway body perpendicular to the crossbar and transversely relative to the guideway body, between at least two transverse positions, wherein in at least one of the at least two transverse positions the crossbar at least partially overlaps with the clear channel of the guideway body, and in at least a second of the at least two transverse positions the window of the stop member at least partially overlaps with the clear channel of the guideway body.