fgdbm_set_fastmode 1117 ext/gdbm/gdbm.c     fgdbm_set_fastmode(obj, RTEST(val) ? Qfalse : Qtrue);
fgdbm_set_fastmode 1217 ext/gdbm/gdbm.c     rb_define_method(rb_cGDBM, "fastmode=", fgdbm_set_fastmode, 1);