code: public java.util.List<RouteFilterPrefix> getAddAllowedPrefixesToDirectConnectGateway() {
          if (addAllowedPrefixesToDirectConnectGateway == null) {
              addAllowedPrefixesToDirectConnectGateway = new com.amazonaws.internal.SdkInternalList<RouteFilterPrefix>();
          }
          return addAllowedPrefixesToDirectConnectGateway;
      }
docs: <p>
  The Amazon VPC prefixes to advertise to the Direct Connect gateway.
  </p>
  
  @return The Amazon VPC prefixes to advertise to the Direct Connect gateway.