Man pages matching name globus_gass_copy.h in section 3:

globus_gass_copy.h.3.en	debian 10 / libglobus-gass-copy-doc
globus_gass_copy.h.3.en	debian 11 / libglobus-gass-copy-doc
globus_gass_copy.h.3.en	debian 12 / libglobus-gass-copy-doc