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() {
if (message == null || message == '') {
return 'Activity is missing. This might happen when running a certain '
'function from the background that requires a UI element (e.g. '
'requesting permissions or enabling the location services).';
}
return message!;
}