ossl_x509_get_not_before  714 ext/openssl/ossl_x509cert.c     rb_str_append(str, rb_inspect(ossl_x509_get_not_before(self)));
ossl_x509_get_not_before  752 ext/openssl/ossl_x509cert.c     rb_define_method(cX509Cert, "not_before", ossl_x509_get_not_before, 0);