(Required, array|string) The saved object types to include in the export.
`per_page`::
(Optional, number) The number of objects to return per page.
`page`::
(Optional, number) The page of objects to return.
`search`::
(Optional, string) An Elasticsearch {ref}/query-dsl-simple-query-string-query.html[simple_query_string] query that filters the objects in the response.
`default_search_operator`::
(Optional, string) The default operator to use for the `simple_query_string`.
`search_fields`::
(Optional, array|string) The fields to perform the `simple_query_string` parsed query against.
`fields`::
(Optional, array|string) The fields to return in the response.
`sort_field`::
(Optional, string) The field that sorts the response.
`has_reference`::
(Optional, object) Filters to objects that have a relationship with the type and ID combination.
NOTE: As objects change in {kib}, the results on each page of the response also
change. Use the find API for traditional paginated results, but avoid using it to export large amounts of data.