{"ast_node_type":"import","tokens":[{"end":66,"kind":"keyword","start":0,"text":"//"}]}
    // mmap the file, because only a small fraction of it is read.
fn get_rmeta_metadata_section<'a, 'p>(filename: &'p Path) -> Result<OwnedSlice, MetadataError<'a>> {
    let file = std::fs::File::open(filename).map_err(|_| {