public BankEntity ClosestEntity(Options userSelection)
{
if (userSelection.SelectAnyEntity () || userSelection.SelectAnySuncorpEntity() ) return NearestEntity ();
if (userSelection.SelectOwnBranches) return EntitiesClosestToUser[BankEntity.Type.Branch];
if (userSelection.SelectAnyAtm ()) return EntitiesClosestToUser[BankEntity.Type.Atm];
return null;
}