/// <summary>
/// Get all managers matching the given type.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="items"></param>
/// <returns> The number of managers added to the given list. </returns>
public static int GetAllManagers <T>(List <T> items) where T : IManager
{
if (instance != null) // Ensure the instance exists
{
return(instance.GetAll <T>(items));
}
else // Instance doesn't exist, cannot get managers
{
return(0);
}
}
