BGP neighbor as variable for filters or function

Hi, I am looking for a variable like bgp_neighbor_as, which I can use in functions or filters: define myas = 65123 if bgp_neighbor_as = myas then bgp_path.prepend(myas); If I have a look at "show protocol all <protocol>" I see Neighbor AS: 65123 So is this neighbor as number available as variable? Rgds, Stefan