SpEL - Test multiple conditions in findAll

Question

I am writing a SpEL condition. It should be a basic IF, THEN, ELSE condition. Currently it is this way:

cus_FinalCostBoolean == true ? FormDetails.findAll{cus_ForceRecommended == true}.min{cus_LastNegotiationRound} : FormDetails.findAll{cus_ForceRecommended == false}.min{cus_LastNegotiationRound}

where: cus_FinalCostBoolean is a boolean variable cus_ForceRecommended is a boolean variable cus_LastNegotiationRound is a decimal number

Currently what this condition does is the following: IF cus_FinalCostBoolean IS TRUE THEN calculate min(cus_LastNegotiationRound) among all the entries that have cus_ForceRecommended = TRUE ELSE calculate min(cus_LastNegotiationRound) among all the entries that have cus_ForceRecommended = FALSE

I'd like editing it the following way: IF cus_FinalCostBoolean IS TRUE THEN calculate min(cus_LastNegotiationRound) among all the entries that have cus_ForceRecommended = TRUE and cus_TechnicalEvaluationPassed = 'OK' ELSE calculate min(cus_LastNegotiationRound) among all the entries that have cus_ForceRecommended = FALSE and cus_LastNegotiationRound is not null

where cus_TechnicalEvaluationPassed is a text variable

I was trying to editing it this way:

cus_FinalCostBoolean == true ? FormDetails.findAll{cus_ForceRecommended == true && cus_TechnicalEvaluationPassed == 'OK'}.min{cus_LastNegotiationRound} : FormDetails.findAll{cus_ForceRecommended == false && cus_LastNegotiationRound != null}.min{cus_LastNegotiationRound}

But it seems it does not work. Could you help me?

Thank you. Best regards.