Function select_excerpt 

pub fn select_excerpt(
    query: &QueryBundle,
    selectors: &[String],
) -> Result<QueryExcerpt, ProjectionError>

Select tldr, document-root content, or complete section subtrees by path or ID.

Duplicate selections and descendants of another selected node are omitted. The result always follows source order, independent of argument order.

Errors

Returns an error when no content exists or any selector is empty or unknown.