Man pages matching name load_datafile_object_indexed in section 3alleg4:

load_datafile_object_indexed.3alleg4.en	debian 10 / allegro4-doc
load_datafile_object_indexed.3alleg4.en	debian 11 / allegro4-doc
load_datafile_object_indexed.3alleg4.en	debian 12 / allegro4-doc