# start method

void start (String name, { Map arguments })

Start a synchronous operation within this task named `name`. Optionally takes a Map of `arguments`.

## Implementation

    void start(String name, {Map arguments}) {
      if (!_hasTimeline) return;
      ArgumentError.checkNotNull(name, 'name');
      var block = new _AsyncBlock._(name, _taskId);
      if (arguments != null) {
        block._arguments = arguments;
      }
      _stack.add(block);
      block._start();
    }