Union of every phrase literal (and its 'not '-negated form) contributed by
the assertions in Assertion.
Used purely to drive editor autocompletion for the phrase parameters of
ExpectFunction/ExpectAsyncFunction. It is wrapped in
LiteralStringUnion at the use site so that the suggestions surface
while any string is still accepted. The assertion chain itself is validated
by the value gate; never here.
Union of every phrase literal (and its
'not '-negated form) contributed by the assertions inAssertion.Used purely to drive editor autocompletion for the
phraseparameters of ExpectFunction/ExpectAsyncFunction. It is wrapped in LiteralStringUnion at the use site so that the suggestions surface while any string is still accepted. The assertion chain itself is validated by thevaluegate; never here.