Return the coadd expId consistent with Gen3 implementation.
This is a temporary interface intended to aid with the migration from
Gen2 to Gen3 middleware. It will be removed with the Gen2 middleware.
Parameters
----------
dataRef : `lsst.daf.persistence.butlerSubset.ButlerDataRef`
The data reference for the patch.
coaddName : `str`, optional
The prefix for the coadd name, e.g. "deep" for "deepCoadd"
includeBand : `bool`, optional
Whether to include band as part of the dataId packing.
log : `lsst.log.Log` or `None`, optional
Logger object for logging messages.
Returns
-------
expId : `int`
The integer id associated with `patchRef` that mimics that of Gen3.
Definition at line 27 of file getGen3CoaddExposureId.py.