code: public DescribeDirectConnectGatewayAssociationProposalsResult withDirectConnectGatewayAssociationProposals(
              DirectConnectGatewayAssociationProposal... directConnectGatewayAssociationProposals) {
          if (this.directConnectGatewayAssociationProposals == null) {
              setDirectConnectGatewayAssociationProposals(new com.amazonaws.internal.SdkInternalList<DirectConnectGatewayAssociationProposal>(
                      directConnectGatewayAssociationProposals.length));
          }
          for (DirectConnectGatewayAssociationProposal ele : directConnectGatewayAssociationProposals) {
              this.directConnectGatewayAssociationProposals.add(ele);
          }
          return this;
      }
docs: <p>
  Describes the Direct Connect gateway association proposals.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setDirectConnectGatewayAssociationProposals(java.util.Collection)} or
  {@link #withDirectConnectGatewayAssociationProposals(java.util.Collection)} if you want to override the existing
  values.
  </p>
  
  @param directConnectGatewayAssociationProposals
  Describes the Direct Connect gateway association proposals.
  @return Returns a reference to this object so that method calls can be chained together.