diff --git a/src/Entity/Index.php b/src/Entity/Index.php
index 9e8990b..59a9f21 100644
--- a/src/Entity/Index.php
+++ b/src/Entity/Index.php
@@ -145,7 +145,12 @@ class Index extends ConfigEntityBase implements IndexInterface {
    *
    * @var array
    */
-  protected $tracker_settings = array('default' => array('plugin_id' => 'default', 'settings' => array()));
+  protected $tracker_settings = array(
+    'default' => array(
+      'plugin_id' => 'default',
+      'settings' => array()
+    ),
+  );
 
   /**
    * The tracker plugin instance.
@@ -194,7 +199,7 @@ class Index extends ConfigEntityBase implements IndexInterface {
    *
    * @see loadProcessors()
    */
-  protected $processorPlugins;
+  protected $processorInstances;
 
   /**
    * Whether reindexing has been triggered for this index in this page request.
@@ -483,13 +488,13 @@ class Index extends ConfigEntityBase implements IndexInterface {
    *   The loaded processors, keyed by processor ID.
    */
   protected function loadProcessors() {
-    if (empty($this->processorPlugins)) {
+    if (empty($this->processorInstances)) {
       /** @var $processor_plugin_manager \Drupal\search_api\Processor\ProcessorPluginManager */
       $processor_plugin_manager = \Drupal::service('plugin.manager.search_api.processor');
       $processor_settings = $this->getProcessorSettings();
 
       foreach ($processor_plugin_manager->getDefinitions() as $name => $processor_definition) {
-        if (class_exists($processor_definition['class']) && empty($this->processorPlugins[$name])) {
+        if (class_exists($processor_definition['class']) && empty($this->processorInstances[$name])) {
           // Create our settings for this processor.
           $settings = empty($processor_settings[$name]['settings']) ? array() : $processor_settings[$name]['settings'];
           $settings['index'] = $this;
@@ -497,7 +502,7 @@ class Index extends ConfigEntityBase implements IndexInterface {
           /** @var $processor \Drupal\search_api\Processor\ProcessorInterface */
           $processor = $processor_plugin_manager->createInstance($name, $settings);
           if ($processor->supportsIndex($this)) {
-            $this->processorPlugins[$name] = $processor;
+            $this->processorInstances[$name] = $processor;
           }
         }
         elseif (!class_exists($processor_definition['class'])) {
@@ -506,7 +511,7 @@ class Index extends ConfigEntityBase implements IndexInterface {
       }
     }
 
-    return $this->processorPlugins;
+    return $this->processorInstances;
   }
 
   /**
@@ -1014,7 +1019,7 @@ class Index extends ConfigEntityBase implements IndexInterface {
     $this->datasourceInstances = NULL;
     $this->trackerInstance = NULL;
     $this->serverInstance = NULL;
-    $this->processorPlugins = NULL;
+    $this->processorInstances = NULL;
     $this->cache = array();
     if ($include_stored) {
       Cache::invalidateTags($this->getCacheTags());
@@ -1605,10 +1610,10 @@ class Index extends ConfigEntityBase implements IndexInterface {
    */
   public function __sleep() {
     $properties = get_object_vars($this);
-    unset($properties['datasourcePlugins']);
-    unset($properties['trackerPlugin']);
+    unset($properties['datasourceInstances']);
+    unset($properties['trackerInstance']);
     unset($properties['serverInstance']);
-    unset($properties['processorPlugins']);
+    unset($properties['processorInstances']);
     unset($properties['cache']);
     return array_keys($properties);
   }