syntax_data: {"ast_node_type":"other","tokens":[{"end":40,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// The line number here is 0-based.
context_before:     /// Gets a line from the list of pre-computed line-beginnings.
context_after:     pub fn get_line(&self, line_number: usize) -> Option<Cow<'_, str>> {