presto-ml/src/main/java/io/prestosql/plugin/ml/LearnLibSvmClassifierAggregation.java/LearnLibSvmClassifierAggregation/input
class LearnLibSvmClassifierAggregation:    @InputFunction
    @LiteralParameters("x")
    public static void input(
            @AggregationState LearnState state,
            @SqlType(BIGINT) long label,
            @SqlType("map(bigint,double)") Block features,
            @SqlType("varchar(x)") Slice parameters)
    {
        input(state, (double) label, features, parameters);
    }