We'd love for you to contribute to our source code and to make Multi-Level-Cache even better.
If you have created a new adapter for a cache that's not supported then you will need to validate it by adding it to the array of caches in the test.multi.js file and run the tests with:
NODE_MULTICACHE_TESTTYPE="integration" npm test
This commit is a good example of how the flushAll() method was added to the project. Use this as a template if you plan on adding a new method. Remember it has to be implemented for each adapter.