A callback which filters the stack trace. Receives an iterable of
strings representing the frames encoded in the way that
StackTrace.toString() provides. Should return an iterable of lines to
output for the stack.
If the FlutterError.defaultStackFilter behavior is desired, then the
callback should manually call that function. That function expects the
incoming list to be in the
StackTrace.toString() format. The output of
that function, however, does not always follow this format.
This won't be called if stack is null.
final IterableFilter<String> stackFilter