Overview:
  This resource applies the standard collection pattern to individual groups.

Method GET:
  Retrieve the group information.

  Query Arguments:
    cached=<boolean>
      If true, only return cached objects.
    resolve_names=<boolean>
      Resolve names of personas.
    zone=<string>
      Filter groups by zone.
    provider=<string>
      Filter groups by provider.

Method PUT:
  Modify the group.

  Query Arguments:
    zone=<string>
      Optional zone.
    provider=<string>
      Optional provider type.

Method DELETE:
  Delete the group.

  Query Arguments:
    cached=<boolean>
      If true, flush the group from the cache.
    zone=<string>
      Filter groups by zone.
    provider=<string>
      Filter groups by provider.

