hasExternalSignalListeners property
final
Whether external widgets (e.g. waveform viewer, signal table) are
listening for signals sent via onSendSignals.
When false, the "Send Signals" context-menu item is hidden even if
onSendSignals is non-null. Defaults to true for backwards
compatibility (the menu appears whenever onSendSignals is provided).
Implementation
final bool hasExternalSignalListeners;