CBLPredictiveModel
@protocol CBLPredictiveModel <NSObject>ENTERPRISE EDITION ONLY
PredictiveModel protocol that allows to integrate machine learning model into CouchbaseLite Query via invoking the Function.prediction() function.
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                  The prediction callback called when invoking the Function.prediction() function inside a query or an index. The input dictionary object’s keys and values will be corresponding to the ‘input’ dictionary parameter of theFunction.prediction() function. If the prediction callback cannot return a result, the prediction callback should return null value, which will be evaluated as MISSING. DeclarationObjective-C - (nullable CBLDictionary *)predict:(nonnull CBLDictionary *)input;ParametersinputThe input dictionary. Return ValueThe output dictionary. 
 CBLPredictiveModel Protocol Reference
        CBLPredictiveModel Protocol Reference