presto-main/src/main/java/io/prestosql/util/FastutilSetHelper.java/FastutilSetHelper/LongStrategy
class FastutilSetHelper:        private LongStrategy(Metadata metadata, Type type)
        {
            hashCodeHandle = metadata.getScalarFunctionImplementation(metadata.resolveOperator(HASH_CODE, ImmutableList.of(type))).getMethodHandle();
            equalsHandle = metadata.getScalarFunctionImplementation(metadata.resolveOperator(EQUAL, ImmutableList.of(type, type))).getMethodHandle();
        }