[boost] [bgl] Manual include necessary for is_in_subset predicate

Hi! I'm using a filtered_graph for a project, which filters edges via the is_in_subset predicate. Is it intended that one must manually include boost/graph/detail/set_adaptor.hpp for this to work? If I only include boost/graph/filtered_graph.hpp and want to use the predicate, the compiler complains about missing set_contains function. I didn't find anything about manual includes in the docs, but maybe there are reasons for it. best regards Matthias Walter