ossl_sslctx_set_ssl_version  193 ext/openssl/ossl_ssl.c     ossl_sslctx_set_ssl_version(self, ssl_method);
ossl_sslctx_set_ssl_version 1373 ext/openssl/ossl_ssl.c     rb_define_method(cSSLContext, "ssl_version=", ossl_sslctx_set_ssl_version, 1);