test_custom_types
=================

This module contains a set of custom data types, with some of the following
patterns:

- typanalyze function registered to a custom type, returning false.
- typanalyze function registered to a custom type, registering invalid stats
  data.
- typanalyze function registered to a custom type, returning false when
  given a stats target.
- typanalyze function registered to a custom type, returning false on its
  second call with a stats target.
