devdocs-8.x-1.x-dev/devdocs.services.yml

services:
  stream_wrapper.devdocs:
    class: Drupal\devdocs\StreamWrapper\DocsStream
    tags:
      - { name: stream_wrapper, scheme: docs }

  path_processor.docs:
    class: Drupal\devdocs\PathProcessor\PathProcessorDocs
    tags:
      - { name: path_processor_inbound, priority: 200 }