findOrNull<S>  method 
- String? tag,
 
Returns the S dependency, if it Inst.isRegistered.
Implementation
S? findOrNull<S>({String? tag}) {
  if (isRegistered<S>(tag: tag)) {
    return find<S>(tag: tag);
  }
  return null;
}
Returns the S dependency, if it Inst.isRegistered.
S? findOrNull<S>({String? tag}) {
  if (isRegistered<S>(tag: tag)) {
    return find<S>(tag: tag);
  }
  return null;
}