syntax_data: {"ast_node_type":"variable","tokens":[{"end":68,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                     let params_in_repr = tcx.params_in_repr(def_id);
context_before:                 if check_params && let Some(args) = path.segments.last().unwrap().args {
context_after:                     // the domain size check is needed because the HIR may not be well-formed at this point