Start a block in this task named name
. Optionally takes
a Map of arguments
.
Returns an AsyncBlock which is used to finish this block.
Source
AsyncBlock start(String name, {Map arguments}) {
if (name is! String) {
throw new ArgumentError.value(name,
'name',
'Must be a String');
}
var block = new AsyncBlock._(name, _taskId, category);
if (arguments is Map) {
block.arguments.addAll(arguments);
}
/// Emit start event.
block._start();
return block;
}