fdbm_has_key      724 ext/dbm/dbm.c      rb_define_method(rb_cDBM, "include?", fdbm_has_key, 1);
fdbm_has_key      725 ext/dbm/dbm.c      rb_define_method(rb_cDBM, "has_key?", fdbm_has_key, 1);
fdbm_has_key      726 ext/dbm/dbm.c      rb_define_method(rb_cDBM, "member?", fdbm_has_key, 1);
fdbm_has_key      728 ext/dbm/dbm.c      rb_define_method(rb_cDBM, "key?", fdbm_has_key, 1);