This optional transformation changes the semantics of Read. The default
semantics return a single value, whereas the transformed version has an
implied LeftShift and therefore returns a set of values, which more
closely matches the way many data stores behave.
This optional transformation changes the semantics of Read. The default semantics return a single value, whereas the transformed version has an implied LeftShift and therefore returns a set of values, which more closely matches the way many data stores behave.