When a plaintiff joins a separate cause of action for which attorney fees are permitted, can the prevailing party recover on the other side of the action?

"When a cause of action for which attorney fees are provided by statute is joined with other causes of action for which attorney fees are not permitted, the prevailing party may recover only on the statutory cause of action. However, the joinder of causes of action should not dilute the right to attorney fees. Such fees need not be apportioned when incurred for representation of an issue common to both a cause of action for which fees are permitted and one for which they are not. All expenses incurred on the common issues qualify for an award. [Citation.] When the liability issues are so interrelated that it would have been impossible to separate them into claims for which attorney fees are properly awarded and claims for which they are not, then allocation is not required. [Citation.]" (Akins v. Enterprise Rent-A-Car Co. (2000) 79 Cal.App.4th 1127, 1133.)