syntax_data: {"ast_node_type":"variable","tokens":[{"end":55,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let params_in_repr = tcx.params_in_repr(adt.did());
context_before:     // but the type parameters may cause a cycle with an upstream type
context_after:     for (i, arg) in args.iter().enumerate() {