code: public java.util.List<String> getTransitGatewayAttachmentIds() {
          if (transitGatewayAttachmentIds == null) {
              transitGatewayAttachmentIds = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return transitGatewayAttachmentIds;
      }
docs: <p>
  The IDs of the attachments.
  </p>
  
  @return The IDs of the attachments.