syntax_data: {"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         //    Self: Bar1<'a, '^0.1>
context_before:         //    of trait ref's bound vars. So, we would end up with predicate like
context_after:         // 2) We can then apply the trait args to this, ending up with