Specifically, how can I find the possible values of sub-option "KernelType" of option "Method" for Classify? Here's an example:
trainingset =
ExampleData[{"MachineLearning", "Titanic"}, "TrainingData"];
c = Classify[trainingset,
Method -> {"SupportVectorMachine",
"KernelType" -> "RadialBasisFunction",
"MulticlassMethod" -> "OneVersusAll"}]
And more generally (although this has been asked previously) I'd like to programmatically enumerate all discrete string values for valid sub-options for any given function.