presto-main/src/main/java/io/prestosql/operator/scalar/annotations/ParametricScalarImplementation.java/ParametricScalarImplementationChoice/compareTo
class ParametricScalarImplementationChoice:        @Override
        public int compareTo(ParametricScalarImplementationChoice choice)
        {
            if (choice.numberOfBlockPositionArguments < this.numberOfBlockPositionArguments) {
                return 1;
            }
            return -1;
        }