startSync method

void startSync (String name, { Map arguments, Flow flow })

Start a synchronous operation labeled name. Optionally takes a Map of arguments. This slice may also optionally be associated with a Flow event. This operation must be finished before returning to the event queue.

Implementation 

static void startSync(String name, {Map arguments, Flow flow}) {
  if (_isProduct) {
    return;
  }
  if (name is! String) {
    throw new ArgumentError.value(name, 'name', 'Must be a String');
  }
  if (!_isDartStreamEnabled()) {
    // Push a null onto the stack and return.
    _stack.add(null);
    return;
  }
  var block = new _SyncBlock._(name, _getTraceClock(), _getThreadCpuClock());
  if (arguments is Map) {
    block._arguments = arguments;
  }
  if (flow is Flow) {
    block.flow = flow;
  }
  _stack.add(block);
}