is
Checks if the control is currently in a started or active operational state.
This state is typically achieved after #start() has been successfully called and before #stop() or #dispose() is invoked.
Checks if the hotspot is currently considered "started" (i.e., visible and enabled).Return
true if the view's visibility is VISIBLE, false otherwise. This implementation assumes that if a hotspot is visible, it is also considered started/active. A more robust check might also consider the `isEnabled()` state.