syntax_data: {"ast_node_type":"variable","tokens":[{"end":99,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                     let descr_pre = &format!("{}implementer{} of ", data.descr_pre, plural_suffix);
context_before:                     let def_id = poly_trait_predicate.trait_ref.def_id;
context_after:                     if check_must_not_suspend_def(