Gets the subset of $terms that are descendants of $term_id.

Retrieves children of taxonomy as term IDs.

Adds count of children to parent count.

Adds any terms from the given IDs to the cache that do not already exist in cache.

Updates term count based on number of objects.

Updates term count based on object types of the current taxonomy.

Splits a batch of shared taxonomy terms.

Adds metadata to a term.

Removes the taxonomy relationship to terms from the cache.

Cleans the caches for a taxonomy.