SubProcess example

'id' => 'test',
  ];

  /** * Tests the sub_process process plugin. * * @dataProvider providerTestSubProcess */
  public function testSubProcess($process_configuration, $source_values = []) {
    $migration = $this->getMigration();
    // Set up the properties for the sub_process.     $plugin = new SubProcess($process_configuration, 'sub_process', []);
    // Manually create the plugins. Migration::getProcessPlugins does this     // normally but the plugin system is not available.     foreach ($process_configuration['process'] as $destination => $source) {
      $sub_process_plugins[$destination][] = new Get(['source' => $source], 'get', []);
    }
    // Set up the key plugins.     $key_plugin['key'][] = new Get(['source' => '@id'], 'get', []);
    $migration->expects($this->exactly(2))
      ->method('getProcessPlugins')
      ->willReturnOnConsecutiveCalls(
        $sub_process_plugins,