docs: public java.util.List<DirectConnectGatewayAssociationProposal> getDirectConnectGatewayAssociationProposals() {
          if (directConnectGatewayAssociationProposals == null) {
              directConnectGatewayAssociationProposals = new com.amazonaws.internal.SdkInternalList<DirectConnectGatewayAssociationProposal>();
          }
          return directConnectGatewayAssociationProposals;
      }