/** create a "copy" of @param other but using a different set of sources @param srcs */
static boost::shared_ptr<Region> create (boost::shared_ptr<Region> other, const SourceList& srcs,
const PBD::PropertyList&, bool announce = true);
/** create a "copy" of @param other but using a different set of sources @param srcs */
static boost::shared_ptr<Region> create (boost::shared_ptr<Region> other, const SourceList& srcs,
const PBD::PropertyList&, bool announce = true);