anchor.diff:  `xpack.notification.slack` ::
   Specifies account information for sending notifications
   via Slack. You can specify the following Slack account attributes:
  -
  ++
  +--
   [[slack-account-attributes]]
   
     `url`;;
  
positive.code:   Default fields values for the issue created in Jira. See
    {xpack-ref}/actions-jira.html#jira-action-attributes[Jira Action Attributes] for more information.
    Optional.
  
  
  [float]
  [[pagerduty-notification-settings]]
  
negative.code:   `event_defaults`;;
    Default values for  {xpack-ref}/actions-pagerduty.html#pagerduty-event-trigger-incident-attributes[
    PagerDuty event attributes]. Optional.
          +
          `description`::
          A string that contains the default description for PagerDuty events.
          If no default is configured, each PagerDuty action must specify a
          `description`.
          +
          `incident_key`::
          A string that contains the default incident key to use when sending
          PagerDuty events.
          +
          `client`::
          A string that specifies the default monitoring client.
          +
          `client_url`::
          The URL of the default monitoring client.
          +
          `event_type`::
          The default event type. Valid values: `trigger`,`resolve`, `acknowledge`.
          +
          `attach_payload`::
          Whether or not to provide the watch payload as context for
          the event by default. Valid values: `true`, `false`.
  --