private void OnDestroy()
{
// unset the singleton reference if it is the current instance
if (_instance == this)
{
_instance = null;
}
}
private void Awake()
{
// check if an object already exists
if (_instance != null)
{
throw new Exception("Only a single instance of 'FirstResponder` should exist at a time.");
}
_instance = this;
}
