/// <summary>Check whether the state needs to execute a transition.</summary>
public FSMStateNode Check()
{
// Make sure we have a valid variable and connection.
if (!_isConnected || _isValidVariable)
{
return(null);
}
// Execute check.
bool check = InternalCheck();
// Return state considering negate value.
return((check && !_negate) || (!check && _negate) ? _exit.GetState() : null);
}