docs: public DescribeTransitGatewayAttachmentsResult withTransitGatewayAttachments(TransitGatewayAttachment... transitGatewayAttachments) {
          if (this.transitGatewayAttachments == null) {
              setTransitGatewayAttachments(new com.amazonaws.internal.SdkInternalList<TransitGatewayAttachment>(transitGatewayAttachments.length));
          }
          for (TransitGatewayAttachment ele : transitGatewayAttachments) {
              this.transitGatewayAttachments.add(ele);
          }
          return this;
      }