toString method
A string representation of this object.
Some classes have a default textual representation,
often paired with a static parse function (like int.parse).
These classes will provide the textual representation as
their string representation.
Other classes have no meaningful textual representation
that a program will care about.
Such classes will typically override toString to provide
useful information when inspecting the object,
mainly for debugging or logging.
Implementation
@override
String toString() => 'WireFact[at=$at, by=$by, confidence=$confidence, entity=$entity, evidence=$evidence, id=$id, knowable=$knowable, names=$names, relation=$relation, seen=$seen, source_=$source_, value=$value]';