public virtual void RemoveAssistantItemRequiredField(AssistantItemRequiredField assistantItemRequiredField)
{
_assistantItemRequiredFields.Remove(assistantItemRequiredField);
}
public virtual void AddAssistantItemRequiredField(AssistantItemRequiredField assistantItemRequiredField)
{
if (!assistantItemRequiredField.IsNew() && _assistantItemRequiredFields.Contains(assistantItemRequiredField)) return;
_assistantItemRequiredFields.Add(assistantItemRequiredField);
}
