syntax_data: {"ast_node_type":"function","tokens":[{"end":61,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn with_root_ctxt(lo: BytePos, hi: BytePos) -> Span {
context_before:     #[inline]
context_after:         Span::new(lo, hi, SyntaxContext::root(), None)