query LibraryCustomMetadataPropertiesPermissionsCustomSubject {
  library(id: "…") {
    customMetadataProperties {
      permissions {
        custom {
          subject {
            ... on UserGroup {
              __typename
              id
              name
              users {
                total
                page
                limit
                hasNextPage
                items {
                  __typename
                  name
                  id
                }
              }
            }
          }
        }
      }
    }
  }
}