{"ast_node_type":"function","tokens":[{"end":94,"kind":"keyword","start":0,"text":"pub(crate)"}]}
    pub(crate) fn make_coverage_span(&self, local_file_id: LocalFileId) -> ffi::CoverageSpan {
    /// Attaches a local file ID to these coordinates to produce an `ffi::CoverageSpan`.
        let &Self { start_line, start_col, end_line, end_col } = self;