const modelFlow = Machine({
    id: 'model',
    initial: 'inactive',
    states: {
      'inactive': {
        on: {
          'check out': 'inactive - checked out',
          'publish': 'active',
        }
      },
      'inactive - checked out': {
        on: {
          'check in': 'inactive',
          'check in & publish': 'active',
          'import': 'inactive - checked out',
          'save': 'inactive - checked out',
          'cancel': 'inactive - checked out',
        }
      },
      'active': {
        on: {
          'check out': 'active - checked out',
          'archive': 'archived',
          'export': 'active',
        }
      },
      'active - checked out': {
        on: {
          'check in': 'active',
          'archive': 'archived',
          'save': 'active - checked out',
          'cancel': 'active - checked out',

        }
      },
      'archived': {
        on: {
          'unarchive': 'inactive'
        }
      }
    }
  });