ActionCondition()

override bool ActionCondition	(	PlayerBase	player,
		ActionTarget	target,
		ItemBase	item )

См. определение в файле ActionDrinkWellContinuous.c строка 42

    {
        if (item && item.IsHeavyBehaviour())
            return false;
        
        if (!player.CanEatAndDrink())
            return false;
        
        Object targetObject = target.GetObject();
        if (targetObject)
        {
            TIntArray componentIndices = new TIntArray();
            targetObject.GetActionComponentsForSelectionName(targetObject.GetViewGeometryLevel(), UAMisc.LIQUID_SOURCE_SELECTION, componentIndices);
            if (componentIndices.Count() > 0 && componentIndices.Find(target.GetComponentIndex()) == -1)
                return false;
        }
        
        return targetObject && (targetObject.GetWaterSourceObjectType() == EWaterSourceObjectType.WELL || targetObject.IsWell());
    }

Перекрестные ссылки ActionTarget() и UAMisc::LIQUID_SOURCE_SELECTION.