{"ast_node_type":"function","tokens":[{"end":39,"kind":"keyword","start":0,"text":"pub"}]}
pub fn is_rust_fence(s: &str) -> bool {
// stripped down version of https://github.com/rust-lang/rust/blob/392ba2ba1a7d6c542d2459fb8133bebf62a4a423/src/librustdoc/html/markdown.rs#L810-L933
    let mut seen_rust_tags = false;