+LDKCVec_u8Z write_jcall(const void* this_arg) {
+ LDKChannelKeys_JCalls *j_calls = (LDKChannelKeys_JCalls*) this_arg;
+ JNIEnv *_env;
+ DO_ASSERT((*j_calls->vm)->GetEnv(j_calls->vm, (void**)&_env, JNI_VERSION_1_8) == JNI_OK);
+ jobject obj = (*_env)->NewLocalRef(_env, j_calls->o);
+ CHECK(obj != NULL);
+ jbyteArray arg = (*_env)->CallObjectMethod(_env, obj, j_calls->write_meth);
+ LDKCVec_u8Z arg_ref;
+ arg_ref.datalen = (*_env)->GetArrayLength (_env, arg);
+ arg_ref.data = MALLOC(arg_ref.datalen, "LDKCVec_u8Z Bytes");
+ (*_env)->GetByteArrayRegion(_env, arg, 0, arg_ref.datalen, arg_ref.data);
+ return arg_ref;
+}