dfp.routing.yml

dfp.admin_settings:
  path: 'admin/structure/dfp/settings'
  defaults:
    _form: '\Drupal\dfp\Form\AdminSettings'
    _title: 'Global DFP Settings'
  requirements:
    _permission: 'administer DFP'

dfp.test_page:
  path: 'admin/structure/dfp/test_page'
  requirements:
    _permission: 'administer DFP'
#  $items['admin/structure/dfp_ads/test_page'] = array(
#    'title' => 'DFP Test Page',
#    'type' => MENU_LOCAL_TASK,
#    'description' => "View all your DFP tags on a single page",
#    'page callback' => 'dfp_adtest_page',
#    'access arguments' => array('administer DFP'),
#    'file' => 'dfp.adtest.inc',
#    'weight' => 10,
#  );

entity.dfp_tag.add_form:
  path: '/admin/structure/dfp/tags/add'
  defaults:
    _entity_form: 'dfp_tag.add'
    _title: 'Add DFP tag'
  requirements:
    _permission: 'administer DFP'

entity.dfp_tag.edit_form:
  path: '/admin/structure/dfp/tags/manage/{dfp_tag}'
  defaults:
    _entity_form: 'dfp_tag.edit'
  requirements:
    _permission: 'administer DFP'

entity.dfp_tag.delete_form:
  path: '/admin/structure/dfp/tags/manage/{dfp_tag}/delete'
  defaults:
    _entity_form: 'dfp_tag.delete'
    _title: 'Delete'
  requirements:
    _permission: 'administer DFP'
#    _entity_access: 'dfp_tag.delete'

entity.dfp_tag.collection:
  path: '/admin/structure/dfp/tags'
  defaults:
    _entity_list: 'dfp_tag'
    _title: 'DFP tags'
  requirements:
    _permission: 'administer DFP'