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() {
/// toList() で、List に変換しないと(Iterable だと)、
/// 長い String が「...」で途中を丸められてしまう。
/// https://api.dart.dev/stable/2.9.0/dart-core/Iterable/toString.html
return map((model)=>model.toString()).toList().toString();
}