added support of multiple outputs in check_xyw
added support of multiple outputs in check_xyw

nickcdryan/hep_ml,anaderi/hep_ml,nickcdryan/hep_ml,zhmz90/hep_ml,chrinide/hep_ml,iamfullofspam/hep_ml,iamfullofspam/hep_ml,anaderi/hep_ml,zhmz90/hep_ml