pub fn payload_of(frontmatter: &Mapping) -> Option<&str>Expand description
The payload a sidecar’s metadata names — its content, when the document
is an attachment (an explicit attachment: true, or a content prov
reads as an opaque payload rather than prose) — or None for a page.
The same two spellings prov::Document::is_attachment accepts, read
off the collected frontmatter rather than a parsed document because the
renderer only ever holds the former.