Facet
Detail for specified facet
`facet_id`: "topics", "facility", "format", "genre", or "rights".
GET /api/0.2/facet/topics/
https://ddr.densho.org/topics/", "json": "https://ddr.densho.org/api/0.2/facet/topics/", "children": "https://ddr.densho.org/api/0.2/facet/topics/children/" }, "title": "Topics", "description": "'DDR Topics'" }{ "id": "topics", "model": "ddrfacet", "links": { "html": "