rb_zstream_closed_p   83 ext/zlib/zlib.c static VALUE rb_zstream_closed_p(VALUE);
rb_zstream_closed_p 3459 ext/zlib/zlib.c     rb_define_method(cZStream, "closed?", rb_zstream_closed_p, 0);
rb_zstream_closed_p 3460 ext/zlib/zlib.c     rb_define_method(cZStream, "ended?", rb_zstream_closed_p, 0);