SummarizerBase performs work shared by all sumarizers, most everything except for
handling of unique keys.
The base class handles creation, allocates storage for Operators and SharedFieldValues,
and similar. Derived classes deal primarily with unique keys and the associated Calculators
and UniqueKeyValuesLists.
SummarizerBase performs work shared by all sumarizers, most everything except for handling of unique keys.
The base class handles creation, allocates storage for Operators and SharedFieldValues, and similar. Derived classes deal primarily with unique keys and the associated Calculators and UniqueKeyValuesLists.