[ALPS-users] Meaning of parameter "SPINFLIP"

Dear ALPS developers, I was wondering about the meaning of the parameter SPINFLIP for the CT-HYB impurity solver. The documentation mentions: SPINFLIP={0,1} specifies whether to perform spin flip updates. In such an update a segment is moved from one orbital to another, if the latter is empty. Does this correspond to a global move that flips all spins, i.e. for enforcing a paramagnetic solution or does it correspond to the part of the rotationally invariant Hund's coupling which is called Spin-Flip term? If it's the first one, are there any plans that Spin-Flip/Pair-Hopping terms can be treated within the CT-HYB solver in the near future? best regards, Steffen