start method
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);
_stack.add(block);
block._start({
if (arguments != null) ...arguments,
if (_parent != null) 'parentId': _parent._taskId.toRadixString(16),
});
}