fgdbm_to_hash    1170 ext/gdbm/gdbm.c     return rb_hash_delete_if(fgdbm_to_hash(obj));
fgdbm_to_hash    1228 ext/gdbm/gdbm.c     rb_define_method(rb_cGDBM, "to_hash", fgdbm_to_hash, 0);