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