description

# finish method Null safety

void finish (

1. {Map? arguments}

)

Finish the last synchronous operation that was started. Optionally takes a Map of `arguments`.

## Implementation

    void finish({Map? arguments}) {
      if (!_hasTimeline) {
        return;
      }
      if (_stack.length == 0) {
        throw new StateError('Uneven calls to start and finish');
      }
      if (_filterKey != null) {
        arguments ??= {};
        arguments[_kFilterKey] = _filterKey;
      }
      // Pop top item off of stack.
      var block = _stack.removeLast();
      block._finish(arguments);
    }