diff --git a/core/modules/migrate/src/Entity/Migration.php b/core/modules/migrate/src/Entity/Migration.php
index 9fb93b7..26a5520 100644
--- a/core/modules/migrate/src/Entity/Migration.php
+++ b/core/modules/migrate/src/Entity/Migration.php
@@ -41,21 +41,21 @@ class Migration extends ConfigEntityBase implements MigrationInterface, Requirem
    *
    * @var string
    */
-  public $id;
+  protected $id;
 
   /**
    * The human-readable label for the migration.
    *
    * @var string
    */
-  public $label;
+  protected $label;
 
   /**
    * The plugin ID for the row.
    *
    * @var string
    */
-  public $row;
+  protected $row;
 
   /**
    * The source configuration, with at least a 'plugin' key.
@@ -64,7 +64,7 @@ class Migration extends ConfigEntityBase implements MigrationInterface, Requirem
    *
    * @var array
    */
-  public $source;
+  protected $source;
 
   /**
    * The source plugin.
@@ -78,21 +78,21 @@ class Migration extends ConfigEntityBase implements MigrationInterface, Requirem
    *
    * @var array
    */
-  public $process;
+  protected $process;
 
   /**
    * The configuration describing the load plugins.
    *
    * @var array
    */
-  public $load;
+  protected $load;
 
   /**
    * The cached process plugins.
    *
    * @var array
    */
-  protected $processPlugins = array();
+  protected $processPlugins = [];
 
   /**
    * The destination configuration, with at least a 'plugin' key.
@@ -101,7 +101,7 @@ class Migration extends ConfigEntityBase implements MigrationInterface, Requirem
    *
    * @var array
    */
-  public $destination;
+  protected $destination;
 
   /**
    * The destination plugin.
@@ -117,7 +117,7 @@ class Migration extends ConfigEntityBase implements MigrationInterface, Requirem
    *
    * @var string
    */
-  public $idMap = array();
+  protected $idMap = [];
 
   /**
    * The identifier map.
@@ -134,7 +134,7 @@ class Migration extends ConfigEntityBase implements MigrationInterface, Requirem
    *
    * @var array
    */
-  public $sourceIds = array();
+  protected $sourceIds = [];
 
   /**
    * The destination identifiers.
@@ -144,14 +144,14 @@ class Migration extends ConfigEntityBase implements MigrationInterface, Requirem
    *
    * @var array
    */
-  public $destinationIds = FALSE;
+  protected $destinationIds = [];
 
   /**
    * Information on the high water mark.
    *
    * @var array
    */
-  public $highWaterProperty;
+  protected $highWaterProperty;
 
   /**
    * Indicate whether the primary system of record for this migration is the
@@ -163,7 +163,7 @@ class Migration extends ConfigEntityBase implements MigrationInterface, Requirem
    *
    * @var string
    */
-  public $systemOfRecord = self::SOURCE;
+  protected $systemOfRecord = self::SOURCE;
 
   /**
    * Specify value of source_row_status for current map row. Usually set by
@@ -171,7 +171,7 @@ class Migration extends ConfigEntityBase implements MigrationInterface, Requirem
    *
    * @var int
    */
-  public $sourceRowStatus = MigrateIdMapInterface::STATUS_IMPORTED;
+  protected $sourceRowStatus = MigrateIdMapInterface::STATUS_IMPORTED;
 
   /**
    * @var \Drupal\Core\KeyValueStore\KeyValueStoreInterface
@@ -179,23 +179,25 @@ class Migration extends ConfigEntityBase implements MigrationInterface, Requirem
   protected $highWaterStorage;
 
   /**
+   * Track time of last import if TRUE.
+   *
    * @var bool
    */
-  public $trackLastImported = FALSE;
+  protected $trackLastImported = FALSE;
 
   /**
    * These migrations must be already executed before this migration can run.
    *
    * @var array
    */
-  protected $requirements = array();
+  protected $requirements = [];
 
   /**
    * These migrations, if ran at all, must be executed before this migration.
    *
    * @var array
    */
-  public $migration_dependencies = array();
+  protected $migration_dependencies = [];
 
   /**
    * The entity manager.
@@ -382,4 +384,52 @@ public function isComplete() {
     return $this->getMigrationResult() === static::RESULT_COMPLETED;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function getProcess() {
+    return $this->process;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setProcess(array $process) {
+    $this->process = $process;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getSystemOfRecord() {
+    return $this->systemOfRecord;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setSystemOfRecord($system_of_record) {
+    $this->systemOfRecord = $system_of_record;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function isTrackLastImported() {
+    return $this->trackLastImported;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setTrackLastImported($track_last_imported) {
+    return $this->trackLastImported = (bool) $track_last_imported;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getMigrationDependencies() {
+    return $this->migration_dependencies;
+  }
 }
diff --git a/core/modules/migrate/src/Entity/MigrationInterface.php b/core/modules/migrate/src/Entity/MigrationInterface.php
index 4bfb89f..f18cc9e 100644
--- a/core/modules/migrate/src/Entity/MigrationInterface.php
+++ b/core/modules/migrate/src/Entity/MigrationInterface.php
@@ -179,4 +179,60 @@ public function setMigrationResult($result);
    */
   public function getMigrationResult();
 
+  /**
+   * Get the current configuration describing the process plugins.
+   *
+   * @return array
+   *   The configuration describing the process plugins.
+   */
+  public function getProcess();
+
+  /**
+   * Set the current configuration describing the process plugins.
+   *
+   * @param array $process
+   *   The configuration describing the process plugins.
+   */
+  public function setProcess(array $process);
+
+  /**
+   * Get the current system of record of the migration.
+   *
+   * @return string
+   *   The current system of record of the migration.
+   */
+  public function getSystemOfRecord();
+
+  /**
+   * Set the system of record for the migration.
+   *
+   * @param string $system_of_record
+   *   The system of record of the migration.
+   */
+  public function setSystemOfRecord($system_of_record);
+
+  /**
+   * Checks if the migration should track time of last import.
+   *
+   * @return bool
+   *   TRUE if the migration is tracking last import time.
+   */
+  public function isTrackLastImported();
+
+  /**
+   * Set if the migration should track time of last import.
+   *
+   * @param bool $track_last_imported
+   *   Boolean value to indicate if the migration should track last import time.
+   */
+  public function setTrackLastImported($track_last_imported);
+
+  /**
+   * Get the dependencies for this migration.
+   *
+   * @return array
+   *   The dependencies for this migrations.
+   */
+  public function getMigrationDependencies();
+
 }
diff --git a/core/modules/migrate/src/MigrationStorage.php b/core/modules/migrate/src/MigrationStorage.php
index 7577956..3d0454e 100644
--- a/core/modules/migrate/src/MigrationStorage.php
+++ b/core/modules/migrate/src/MigrationStorage.php
@@ -27,20 +27,22 @@ public function buildDependencyMigration(array $migrations, array $dynamic_ids)
     $requirement_graph = array();
     $different = FALSE;
     foreach ($migrations as $migration) {
-      /** @var \Drupal\migrate\Entity\Migration $migration */
+      /** @var \Drupal\migrate\Entity\MigrationInterface $migration */
       $id = $migration->id();
       $requirements[$id] = array();
       $dependency_graph[$id]['edges'] = array();
-      if (isset($migration->migration_dependencies['required'])) {
-        foreach ($migration->migration_dependencies['required'] as $dependency) {
+      $migration_dependencies = $migration->getMigrationDependencies();
+
+      if (isset($migration_dependencies['required'])) {
+        foreach ($migration_dependencies['required'] as $dependency) {
           if (!isset($dynamic_ids[$dependency])) {
             $this->addDependency($requirement_graph, $id, $dependency, $dynamic_ids);
           }
           $this->addDependency($dependency_graph, $id, $dependency, $dynamic_ids);
         }
       }
-      if (isset($migration->migration_dependencies['optional'])) {
-        foreach ($migration->migration_dependencies['optional'] as $dependency) {
+      if (isset($migration_dependencies['optional'])) {
+        foreach ($migration_dependencies['optional'] as $dependency) {
           $different = TRUE;
           $this->addDependency($dependency_graph, $id, $dependency, $dynamic_ids);
         }
diff --git a/core/modules/migrate_drupal/src/Plugin/migrate/load/LoadEntity.php b/core/modules/migrate_drupal/src/Plugin/migrate/load/LoadEntity.php
index b7a9283..5e1d291 100644
--- a/core/modules/migrate_drupal/src/Plugin/migrate/load/LoadEntity.php
+++ b/core/modules/migrate_drupal/src/Plugin/migrate/load/LoadEntity.php
@@ -92,7 +92,8 @@ public function loadMultiple(EntityStorageInterface $storage, array $sub_ids = N
             // Specifically process the link field until core is fixed.
             // @see https://www.drupal.org/node/2235457
             if ($data['type'] == 'link') {
-              $migration->process[$field_name] = [
+              $process = $migration->getProcess();
+              $process[$field_name] = [
                 'plugin' => 'd6_cck_link',
                 'source' => [
                   $field_name,
@@ -100,9 +101,11 @@ public function loadMultiple(EntityStorageInterface $storage, array $sub_ids = N
                   $field_name . '_attributes',
                 ],
               ];
+              $migration->setProcess($process);
             }
             elseif ($data['type'] === 'filefield') {
-              $migration->process[$field_name] = [
+              $process = $migration->getProcess();
+              $process[$field_name] = [
                 'plugin' => 'd6_cck_file',
                 'source' => [
                   $field_name,
@@ -110,15 +113,18 @@ public function loadMultiple(EntityStorageInterface $storage, array $sub_ids = N
                   $field_name . '_data',
                 ],
               ];
+              $migration->setProcess($process);
             }
             else {
-              $migration->process[$field_name] = $field_name;
+              $process = $migration->getProcess();
+              $process[$field_name] = $field_name;
+              $migration->setProcess($process);
             }
           }
         }
         else {
           $fields = array_keys($migration->getSourcePlugin()->fields());
-          $migration->process += array_combine($fields, $fields);
+          $migration->setProcess($migration->getProcess() + array_combine($fields, $fields));
         }
         $migrations[$migration->id()] = $migration;
       }
diff --git a/core/modules/migrate_drupal/src/Tests/d6/MigrateFileTest.php b/core/modules/migrate_drupal/src/Tests/d6/MigrateFileTest.php
index 48645c1..9040c00 100644
--- a/core/modules/migrate_drupal/src/Tests/d6/MigrateFileTest.php
+++ b/core/modules/migrate_drupal/src/Tests/d6/MigrateFileTest.php
@@ -32,9 +32,11 @@ protected function setUp() {
     $dumps = array(
       $this->getDumpDirectory() . '/Drupal6File.php',
     );
-    /** @var \Drupal\migrate\entity\Migration $migration */
+    /** @var \Drupal\migrate\Entity\MigrationInterface $migration */
     $migration = entity_load('migration', 'd6_file');
-    $migration->source['conf_path'] = 'core/modules/simpletest';
+    $source = $migration->get('source');
+    $source['conf_path'] = 'core/modules/simpletest';
+    $migration->set('source', $source);
     $this->prepare($migration, $dumps);
     $executable = new MigrateExecutable($migration, $this);
     $executable->import();
diff --git a/core/modules/migrate_drupal/src/Tests/d6/MigrateUserPictureFileTest.php b/core/modules/migrate_drupal/src/Tests/d6/MigrateUserPictureFileTest.php
index ff204f7..39cf23b 100644
--- a/core/modules/migrate_drupal/src/Tests/d6/MigrateUserPictureFileTest.php
+++ b/core/modules/migrate_drupal/src/Tests/d6/MigrateUserPictureFileTest.php
@@ -32,9 +32,11 @@ protected function setUp() {
     $dumps = array(
       $this->getDumpDirectory() . '/Drupal6User.php',
     );
-    /** @var \Drupal\migrate\entity\Migration $migration */
+    /** @var \Drupal\migrate\Entity\MigrationInterface $migration */
     $migration = entity_load('migration', 'd6_user_picture_file');
-    $migration->source['conf_path'] = 'core/modules/simpletest';
+    $source = $migration->get('source');
+    $source['conf_path'] = 'core/modules/simpletest';
+    $migration->set('source', $source);
     $this->prepare($migration, $dumps);
     $executable = new MigrateExecutable($migration, $this);
     $executable->import();