syntax_data: {"ast_node_type":"variable","tokens":[{"end":51,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let new_ctxt32 = new_ctxt.as_u32();
context_before:                 let new_ctxt = map(SyntaxContext::from_u16(span.ctxt));
context_after:                 return if new_ctxt32 <= MAX_CTXT {