postEvent function Null safety

void postEvent (
  1. String eventKind,
  2. Map eventData
)

Post an event of eventKind with payload of eventData to the Extension event stream.

Implementation

void postEvent(String eventKind, Map eventData) {
  // TODO: When NNBD is complete, delete the following two lines.
  ArgumentError.checkNotNull(eventKind, 'eventKind');
  ArgumentError.checkNotNull(eventData, 'eventData');
  String eventDataAsString = json.encode(eventData);
  _postEvent(eventKind, eventDataAsString);
}