syntax_data: {"ast_node_type":"variable","tokens":[{"end":57,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let (len, ctxt32) = (hi.0 - lo.0, ctxt.as_u32());
context_before:         // Small len and ctxt may enable one of fully inline formats (or may not).
context_after:         if len <= MAX_LEN && ctxt32 <= MAX_CTXT {