/// <summary>
/// Register a filter function.
/// A filter must be defined as a public static function that returns a string.
/// </summary>
/// <param name="filterMethod"></param>
/// <param name="filterName"></param>
public static void RegisterFilter(MethodInfo filterMethod, string filterName = null)
{
if (_engine == null)
{
return;
}
_engine.RegisterFilter(filterMethod, filterName);
}