doc: just added docstring
doc: just added docstring

nicholsn/ncanda-data-integration,abonil91/ncanda-data-integration,kipohl/ncanda-data-integration,nicholsn/ncanda-data-integration,sibis-platform/ncanda-datacore,sibis-platform/ncanda-datacore,abonil91/ncanda-data-integration,kipohl/ncanda-data-integration,sibis-platform/ncanda-data-integration,sibis-platform/ncanda-data-integration,kipohl/ncanda-data-integration,sibis-platform/ncanda-datacore,abonil91/ncanda-data-integration,nicholsn/ncanda-data-integration