impl_holder.held = new FeeEstimator(new bindings.LDKFeeEstimator() {
@Override public int get_est_sat_per_1000_weight(ConfirmationTarget confirmation_target) {
int ret = arg.get_est_sat_per_1000_weight(confirmation_target);
impl_holder.held = new FeeEstimator(new bindings.LDKFeeEstimator() {
@Override public int get_est_sat_per_1000_weight(ConfirmationTarget confirmation_target) {
int ret = arg.get_est_sat_per_1000_weight(confirmation_target);