service plugin.manager.layout

LayoutController::create in drupal/core/modules/layout/lib/Drupal/layout/Controller/LayoutController.php

Instantiates a new instance of this controller.

LayoutDerivativesTest::testDerivatives in drupal/core/modules/layout/lib/Drupal/layout/Tests/LayoutDerivativesTest.php

Tests for module/theme layout derivatives.

layout_manager in drupal/core/modules/layout/layout.module

Get the layout plugin manager instance.

class: Drupal\layout\Plugin\Type\LayoutManager
arguments:
  - '@container.namespaces'