One more note about Singleton in Flex

Could you imagine that this code throws a Run-Time Error 1115 - because of class RecordTypesManagerInstance does not exist at the static initialization time

package com.os.sp.common
{
    public class RecordTypesManager
    {
        public static var instance:RecordTypesManagerInstance = new RecordTypesManagerInstance();
    }
}

class RecordTypesManagerInstance
{
    ..
}

correct code is:

package com.os.sp.common
{
    public class RecordTypesManager
    {
        public static function get instance():RecordTypesManagerInstance
        {
            if(_instance == null) _instance = new RecordTypesManagerInstance();

            return _instance;
        }

        private static var _instance:RecordTypesManagerInstance;
    }
}

class RecordTypesManagerInstance
{
}