      - '3 - Class based views': 'tutorial/3-class-based-views.md'
      - '4 - Authentication and permissions': 'tutorial/4-authentication-and-permissions.md'
      - '5 - Relationships and hyperlinked APIs': 'tutorial/5-relationships-and-hyperlinked-apis.md'
      - '6 - Viewsets and routers': 'tutorial/6-viewsets-and-routers.md'
   - API Guide:
      - 'Requests': 'api-guide/requests.md'
      - 'Responses': 'api-guide/responses.md'
      - 'Views': 'api-guide/views.md'
 
</s> remove         urls = []
 </s> add         urls = super(DefaultRouter, self).get_urls()
    - '7 - Schemas and client libraries': 'tutorial/7-schemas-and-client-libraries.md'
      - '3 - Class based views': 'tutorial/3-class-based-views.md'
      - '4 - Authentication and permissions': 'tutorial/4-authentication-and-permissions.md'
      - '5 - Relationships and hyperlinked APIs': 'tutorial/5-relationships-and-hyperlinked-apis.md'
      - '6 - Viewsets and routers': 'tutorial/6-viewsets-and-routers.md'
    - '7 - Schemas and client libraries': 'tutorial/7-schemas-and-client-libraries.md'
   - API Guide:
      - 'Requests': 'api-guide/requests.md'
      - 'Responses': 'api-guide/responses.md'
      - 'Views': 'api-guide/views.md'
keep keep keep add keep keep keep keep
 Schemas & client libraries. (#4179)

* Added schema generation support.
* New tutorial section.
* API guide on schema generation.
* Topic guide on API clients. 
mkdocs.yml