Creates a function that takes an index pair and returns a prediction for each of the predictProbInternal implementers.
# S3 method for heuristics
createFunction(object, test_data)
A heuristics object.
The test data that row_pairs will be drawn from. We recommend
A function that can easily be used by rowPairApply to generate predictions for all heuristics the object was created with. If it was created with M heuristics, it will generate M predictions.