--- /dev/null
+<?php
+
+namespace Drupal\layout_builder;
+
+/**
+ * Defines events for the layout_builder module.
+ *
+ * @see \Drupal\layout_builder\Event\SectionComponentBuildRenderArrayEvent
+ *
+ * @internal
+ * Layout Builder is currently experimental and should only be leveraged by
+ * experimental modules and development releases of contributed modules.
+ * See https://www.drupal.org/core/experimental for more information.
+ */
+final class LayoutBuilderEvents {
+
+ /**
+ * Name of the event fired when a component's render array is built.
+ *
+ * This event allows modules to collaborate on creating the render array of
+ * the SectionComponent object. The event listener method receives a
+ * \Drupal\layout_builder\Event\SectionComponentBuildRenderArrayEvent
+ * instance.
+ *
+ * @Event
+ *
+ * @see \Drupal\layout_builder\Event\SectionComponentBuildRenderArrayEvent
+ * @see \Drupal\layout_builder\SectionComponent::toRenderArray()
+ *
+ * @var string
+ */
+ const SECTION_COMPONENT_BUILD_RENDER_ARRAY = 'section_component.build.render_array';
+
+}