postEvent function Null safety
Post an event of eventKind
with payload of eventData
to the "Extension"
event stream.
If extensionStreamHasListener is false, this method is a no-op.
Implementation
void postEvent(String eventKind, Map eventData) {
if (!extensionStreamHasListener) {
return;
}
// TODO: When NNBD is complete, delete the following two lines.
checkNotNullable(eventKind, 'eventKind');
checkNotNullable(eventData, 'eventData');
String eventDataAsString = json.encode(eventData);
_postEvent(eventKind, eventDataAsString);
}