const fetchMachine = Machine({
    id: 'contacts',
    initial: 'add_contacts_button',
    
    states: {
      add_contacts_button: {
        on: {
          ADDED: 'permission_screen'
        }
      },
      permission_screen: {
        on: {
          APPROVED: 'selection_screen',
          REJECTED: 'add_contacts_button'
        }
      },
      selection_screen: {
        onEntry: 'deselectConflicts',
         on: {
          CONTACT_SELECTED: 'selection_screen',
          CONTACT_DESELECTED: 'selection_screen',
          SELECT_ALL: 'selection_screen',
          DESELECT_ALL: 'selection_screen',
          ADD_CONTACTS: 'add_contacts_button',
        },
        initial: 'entireSelection',
         states: {
           entireSelection: {
             TOGGLE_FILTER:  'justTheConflicts'
           },
           justTheConflicts: {
             on: {
              SELECTED_FIELD_TO_OVERWRITE:'justTheConflicts',
          SELECTED_FIELD_FOR_ALL_OVERWRITES:'justTheConflicts',
                    TOGGLE_FILTER:  'entireSelection'
             }
           },
        
         }
      }
    }
  });