Optional ReadonlyexpectedOptional ReadonlyfoundReadonlykindOptional ReadonlynameWhat the occurrence is about, when one thing is: the event, action, property, component type, or context key involved.
ReadonlynodeThe node's id or canonical path, when one applies.
ReadonlyviewStable identity of the originating view, plus the builder's label when set.
Detail in the gate's own terms, when it applies: the declared type or shape that was expected, and the kind that arrived (or
missing).