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() => (ClassToString('Address')
..add('city', _self.city)
..add('country', _self.country)
..add('line1', _self.line1)
..add('line2', _self.line2)
..add('postalCode', _self.postalCode)
..add('state', _self.state))
.toString();