sendEvent method Null safety

void sendEvent(
  1. SemanticsEvent event
)

Sends a SemanticsEvent associated with this SemanticsNode.

Semantics events should be sent to inform interested parties (like the accessibility system of the operating system) about changes to the UI.

Implementation

void sendEvent(SemanticsEvent event) {
  if (!attached)
    return;
  SystemChannels.accessibility.send(event.toMap(nodeId: id));
}