maestro-3.0.1-rc2/maestro.services.yml

services:
  plugin.manager.maestro_tasks:
    class: Drupal\maestro\MaestroEngineTasksPluginManager
    arguments: ['@container.namespaces', '@cache.default', '@module_handler']

  plugin.manager.set_process_variable_plugins:
    class: Drupal\maestro\MaestroSetProcessVariablePluginManager
    arguments: ['@container.namespaces', '@cache.default', '@module_handler']