syntax_data: {"ast_node_type":"function","tokens":[{"end":72,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn get_line(&self, line_number: usize) -> Option<Cow<'_, str>> {
context_before:     /// The line number here is 0-based.
context_after:         fn get_until_newline(src: &str, begin: usize) -> &str {