dispose method
void
dispose()
Disposes the shared Disposables, last made first, then the index, the camera and the state. Once only.
Implementation
void dispose() {
if (_disposed) return;
_disposed = true;
for (final value in _made.reversed) {
if (value is Disposable) value.dispose();
}
_made.clear();
_shared.clear();
index.dispose();
camera.dispose();
_symbolsState.dispose();
}