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() {
final done = fraction;
final percent = done == null ? '?' : (done * 100).toStringAsFixed(1);
return '${model.fileName} $percent% ($receivedBytes bytes)';
}