ValuePlusHash #

In situations where a job must return an Object, but you already have a hash handy (or need to provide one due to DeepDiff not supporting your object type), you can return a ppg2.ValuePlusHash(payload, hash_hexdigest) object.

This is supported by AttributeLoadingJobs and DataLoadingJobs, though the later technically do not make use of the payload.

It is not used by CachedAttributeLoadingJob or CachedDataLoadingJobs - these use the pickled representation that their caching part uses to calculate the hash. They use ValuePlusHash internally.

At times, returning a UseInputHashesForOutput(payload) use might be more appropriate.