entity.block.off_canvas_form: path: '/admin/structure/block/manage/{block}/off-canvas' defaults: _entity_form: 'block.off_canvas' _title_callback: '\Drupal\settings_tray\Block\BlockEntityOffCanvasForm::title' requirements: _permission: 'administer blocks' _access_block_plugin_has_settings_tray_form: 'TRUE'