Issue #2971338 by Jo Fitzgerald, quietone, joachim:...

Issue #2971338 by Jo Fitzgerald, quietone, joachim: MigrationLookupTest::testMultipleSourceIds() uses wrong class for mocking

core/modules/migrate/tests/src/Unit/process/MigrationLookupTest.php

@@ -4,6 +4,7 @@
 
 use Drupal\Core\Entity\EntityStorageInterface;
 use Drupal\migrate\MigrateSkipProcessException;
+use Drupal\migrate\Plugin\migrate\process\Get;
 use Drupal\migrate\Plugin\MigrationInterface;
 use Drupal\migrate\Plugin\migrate\process\MigrationLookup;
 use Drupal\migrate\Plugin\MigrateDestinationInterface;
@@ -249,7 +250,7 @@ public function testMultipleSourceIds() {
     $migration_plugin_manager = $this->prophesize(MigrationPluginManagerInterface::class);
     $process_plugin_manager = $this->prophesize(MigratePluginManager::class);
     $foobaz_migration = $this->prophesize(MigrationInterface::class);
-    $get_migration = $this->prophesize(MigrationLookup::class);
+    $get_migration = $this->prophesize(Get::class);
     $id_map = $this->prophesize(MigrateIdMapInterface::class);
     $destination_plugin = $this->prophesize(MigrateDestinationInterface::class);
     $source_plugin = $this->prophesize(MigrateSourceInterface::class);