instant method Null safety

void instant(
  1. String name,
  2. {Map? arguments}
)

Emit an instant event for this task. Optionally takes a Map of arguments.

Implementation

void instant(String name, {Map? arguments}) {
  if (!_hasTimeline) return;
  // TODO: When NNBD is complete, delete the following line.
  ArgumentError.checkNotNull(name, 'name');
  if (!_isDartStreamEnabled()) {
    // Stream is disabled.
    return;
  }
  Map? instantArguments;
  if (arguments != null) {
    instantArguments = new Map.from(arguments);
  }
  if (_filterKey != null) {
    instantArguments ??= {};
    instantArguments[_kFilterKey] = _filterKey;
  }
  _reportTaskEvent(
      _taskId, _asyncInstant, name, _argumentsAsJson(instantArguments));
}