debugAssertIsValid method Null safety
override
In debug mode, throws an exception if the object is not in a valid configuration. Otherwise, returns true.
This is intended to be used as follows:
assert(myTextSpan.debugAssertIsValid());
Implementation
@override
bool debugAssertIsValid() {
assert(() {
if (children != null) {
for (final InlineSpan child in children!) {
if (child == null) {
throw FlutterError.fromParts(<DiagnosticsNode>[
ErrorSummary('TextSpan contains a null child.'),
ErrorDescription(
'A TextSpan object with a non-null child list should not have any nulls in its child list.',
),
toDiagnosticsNode(
name: 'The full text in question was',
style: DiagnosticsTreeStyle.errorProperty,
),
]);
}
assert(child.debugAssertIsValid());
}
}
return true;
}());
return super.debugAssertIsValid();
}