docs: public java.util.List<RouteFilterPrefix> getAllowedPrefixesToDirectConnectGateway() {
          if (allowedPrefixesToDirectConnectGateway == null) {
              allowedPrefixesToDirectConnectGateway = new com.amazonaws.internal.SdkInternalList<RouteFilterPrefix>();
          }
          return allowedPrefixesToDirectConnectGateway;
      }