$migration_plugin_manager = $this->prophesize(MigrationPluginManagerInterface::class);
$process_plugin_manager = $this->prophesize(MigratePluginManager::class);
$foobaz_migration = $this->prophesize(MigrationInterface::class);
$migration_plugin_manager = $this->prophesize(MigrationPluginManagerInterface::class);
$process_plugin_manager = $this->prophesize(MigratePluginManager::class);
$foobaz_migration = $this->prophesize(MigrationInterface::class);