syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // 1) Self: Bar1<'a, '^0.0> -> Self: Bar1<'a, '^0.1>
context_before:         let trait_bound_vars = trait_ref.bound_vars();
context_after:         let shifted_pred =