id = env->GetStaticMethodID(cls, name, signature);
if (not id) {
jmethodID tostr_id = env->GetMethodID(cls, "getName", "()Ljava/lang/String;");
jstring jclassname = (jstring) env->CallObjectMethod(cls, tostr_id, nullptr);
id = env->GetStaticMethodID(cls, name, signature);
if (not id) {
jmethodID tostr_id = env->GetMethodID(cls, "getName", "()Ljava/lang/String;");
jstring jclassname = (jstring) env->CallObjectMethod(cls, tostr_id, nullptr);