SummaryAssertionGroupType
Represents the AssertionGroupType for AssertionGroups whose assertions should all be reported in reporting (no filtering by a Reporter) since it represents a summary which itself will point out which assertions hold and which do not.
This AssertionGroupType should only be used for cases where we need to present a result as a whole and where filtering out successful assertions would either be misleading or not complete.
An AssertionFormatter will typically use PrefixSuccessfulSummaryAssertion and PrefixFailingSummaryAssertion to prefix the AssertionGroup.assertions.