Many contributed Drupal modules are responsible for maintaining data - they define new field types or entity types, or maintain custom tables of their own. Usually to migrate data into these modules will require custom support (in the form of destination plugins and/or field handlers) to be programmed. Ideally the contributed module itself will implement this support, although some modules are still supported by the Migrate Extras module. This section of the Migrate documentation is the place to document the support for contributed modules (one subpage per module).