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diff --git a/web/core/modules/content_moderation/src/ModerationInformationInterface.php b/web/core/modules/content_moderation/src/ModerationInformationInterface.php
new file mode 100644
index 000000000..862987f8d
--- /dev/null
+++ b/web/core/modules/content_moderation/src/ModerationInformationInterface.php
@@ -0,0 +1,140 @@
+<?php
+
+namespace Drupal\content_moderation;
+
+use Drupal\Core\Entity\ContentEntityInterface;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Entity\EntityTypeInterface;
+
+/**
+ * Interface for moderation_information service.
+ */
+interface ModerationInformationInterface {
+
+  /**
+   * Determines if an entity is moderated.
+   *
+   * @param \Drupal\Core\Entity\EntityInterface $entity
+   *   The entity we may be moderating.
+   *
+   * @return bool
+   *   TRUE if this entity is moderated, FALSE otherwise.
+   */
+  public function isModeratedEntity(EntityInterface $entity);
+
+  /**
+   * Determines if an entity type can have moderated entities.
+   *
+   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
+   *   An entity type object.
+   *
+   * @return bool
+   *   TRUE if this entity type can have moderated entities, FALSE otherwise.
+   */
+  public function canModerateEntitiesOfEntityType(EntityTypeInterface $entity_type);
+
+  /**
+   * Determines if an entity type/bundle entities should be moderated.
+   *
+   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
+   *   The entity type definition to check.
+   * @param string $bundle
+   *   The bundle to check.
+   *
+   * @return bool
+   *   TRUE if an entity type/bundle entities should be moderated, FALSE
+   *   otherwise.
+   */
+  public function shouldModerateEntitiesOfBundle(EntityTypeInterface $entity_type, $bundle);
+
+  /**
+   * Loads the latest revision of a specific entity.
+   *
+   * @param string $entity_type_id
+   *   The entity type ID.
+   * @param int $entity_id
+   *   The entity ID.
+   *
+   * @return \Drupal\Core\Entity\ContentEntityInterface|null
+   *   The latest entity revision or NULL, if the entity type / entity doesn't
+   *   exist.
+   */
+  public function getLatestRevision($entity_type_id, $entity_id);
+
+  /**
+   * Returns the revision ID of the latest revision of the given entity.
+   *
+   * @param string $entity_type_id
+   *   The entity type ID.
+   * @param int $entity_id
+   *   The entity ID.
+   *
+   * @return int
+   *   The revision ID of the latest revision for the specified entity, or
+   *   NULL if there is no such entity.
+   */
+  public function getLatestRevisionId($entity_type_id, $entity_id);
+
+  /**
+   * Returns the revision ID of the default revision for the specified entity.
+   *
+   * @param string $entity_type_id
+   *   The entity type ID.
+   * @param int $entity_id
+   *   The entity ID.
+   *
+   * @return int
+   *   The revision ID of the default revision, or NULL if the entity was
+   *   not found.
+   */
+  public function getDefaultRevisionId($entity_type_id, $entity_id);
+
+  /**
+   * Determines if an entity is a latest revision.
+   *
+   * @param \Drupal\Core\Entity\ContentEntityInterface $entity
+   *   A revisionable content entity.
+   *
+   * @return bool
+   *   TRUE if the specified object is the latest revision of its entity,
+   *   FALSE otherwise.
+   */
+  public function isLatestRevision(ContentEntityInterface $entity);
+
+  /**
+   * Determines if a forward revision exists for the specified entity.
+   *
+   * @param \Drupal\Core\Entity\ContentEntityInterface $entity
+   *   The entity which may or may not have a forward revision.
+   *
+   * @return bool
+   *   TRUE if this entity has forward revisions available, FALSE otherwise.
+   */
+  public function hasForwardRevision(ContentEntityInterface $entity);
+
+  /**
+   * Determines if an entity is "live".
+   *
+   * A "live" entity revision is one whose latest revision is also the default,
+   * and whose moderation state, if any, is a published state.
+   *
+   * @param \Drupal\Core\Entity\ContentEntityInterface $entity
+   *   The entity to check.
+   *
+   * @return bool
+   *   TRUE if the specified entity is a live revision, FALSE otherwise.
+   */
+  public function isLiveRevision(ContentEntityInterface $entity);
+
+  /**
+   * Gets the workflow for the given content entity.
+   *
+   * @param \Drupal\Core\Entity\ContentEntityInterface $entity
+   *   The content entity to get the workflow for.
+   *
+   * @return \Drupal\workflows\WorkflowInterface|null
+   *   The workflow entity. NULL if there is no workflow.
+   */
+  public function getWorkflowForEntity(ContentEntityInterface $entity);
+
+}