.../modules/rest/src/Entity/ConfigDependencies.php | 22 ++++++++++++++++++
 .../modules/rest/src/Entity/RestResourceConfig.php | 26 +++++++++++++++++++++-
 2 files changed, 47 insertions(+), 1 deletion(-)

diff --git a/core/modules/rest/src/Entity/ConfigDependencies.php b/core/modules/rest/src/Entity/ConfigDependencies.php
index 5475d0d..a36a525 100644
--- a/core/modules/rest/src/Entity/ConfigDependencies.php
+++ b/core/modules/rest/src/Entity/ConfigDependencies.php
@@ -117,6 +117,28 @@ protected function calculateDependenciesForMethodGranularity(RestResourceConfigI
    * @see \Drupal\Core\Config\Entity\ConfigEntityInterface::onDependencyRemoval()
    */
   public function onDependencyRemoval(RestResourceConfigInterface $rest_config, array $dependencies) {
+    $granularity = $rest_config->get('granularity');
+    if ($granularity === 'method') {
+      return $this->onDependencyRemovalForMethodGranularity($rest_config, $dependencies);
+    }
+    else {
+      // @todo Add resource-level granularity support in https://www.drupal.org/node/2721595.
+    }
+  }
+
+  /**
+   * Informs the entity that entities it depends on will be deleted.
+   *
+   * @param \Drupal\rest\RestResourceConfigInterface $rest_config
+   *   The rest configuration.
+   * @param array $dependencies
+   *   An array of dependencies that will be deleted keyed by dependency type.
+   *   Dependency types are, for example, entity, module and theme.
+   *
+   * @return bool
+   *   TRUE if the entity has been changed as a result, FALSE if not.
+   */
+  public function onDependencyRemovalForMethodGranularity(RestResourceConfigInterface $rest_config, array $dependencies) {
     $changed = FALSE;
     // Only module-related dependencies can be fixed. All other types of
     // dependencies cannot, because they were not generated based on supported
diff --git a/core/modules/rest/src/Entity/RestResourceConfig.php b/core/modules/rest/src/Entity/RestResourceConfig.php
index dde5d2c..e59c38a 100644
--- a/core/modules/rest/src/Entity/RestResourceConfig.php
+++ b/core/modules/rest/src/Entity/RestResourceConfig.php
@@ -149,7 +149,13 @@ public function getAuthenticationProviders($method) {
   }
 
   /**
-   * {@inheritdoc}
+   * Retrieves a list of supported authentication providers.
+   *
+   * @param string $method
+   *   The request method e.g GET or POST.
+   *
+   * @return string[]
+   *   A list of supported authentication provider IDs.
    */
   public function getAuthenticationProvidersForMethodGranularity($method) {
     $method = $this->normalizeRestMethod($method);
@@ -163,6 +169,24 @@ public function getAuthenticationProvidersForMethodGranularity($method) {
    * {@inheritdoc}
    */
   public function getFormats($method) {
+    if ($this->granularity === 'method') {
+      return $this->getFormatsForMethodGranularity($method);
+    }
+    else {
+      // @todo Add resource-level granularity support in https://www.drupal.org/node/2721595.
+    }
+  }
+
+  /**
+   * Retrieves a list of supported response formats.
+   *
+   * @param string $method
+   *   The request method e.g GET or POST.
+   *
+   * @return string[]
+   *   A list of supported format IDs.
+   */
+  protected function getFormatsForMethodGranularity($method) {
     $method = $this->normalizeRestMethod($method);
     if (in_array($method, $this->getMethods()) && isset($this->configuration[$method]['supported_formats'])) {
       return $this->configuration[$method]['supported_formats'];