code: public DescribeDirectConnectGatewayAttachmentsResult withDirectConnectGatewayAttachments(DirectConnectGatewayAttachment... directConnectGatewayAttachments) {
          if (this.directConnectGatewayAttachments == null) {
              setDirectConnectGatewayAttachments(new com.amazonaws.internal.SdkInternalList<DirectConnectGatewayAttachment>(
                      directConnectGatewayAttachments.length));
          }
          for (DirectConnectGatewayAttachment ele : directConnectGatewayAttachments) {
              this.directConnectGatewayAttachments.add(ele);
          }
          return this;
      }
docs: <p>
  The attachments.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setDirectConnectGatewayAttachments(java.util.Collection)} or
  {@link #withDirectConnectGatewayAttachments(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param directConnectGatewayAttachments
  The attachments.
  @return Returns a reference to this object so that method calls can be chained together.