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noSuchMethod()
noSuchMethod() method
class A {
// Unless you override noSuchMethod, using a non-existent member results in a NoSuchMethodError.
@override
void noSuchMethod(Invocation invocation) {
print('You tried to use a non-existent member: ' + '${invocation.memberName}');
}
}To detect or react whenever code attempts to use a non-existent method or instance variable, you can override noSuchMethod().