syntax_data: {"ast_node_type":"other","tokens":[{"end":34,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // We want to end up with:
context_before:         // predicate: for<'b> Self: Bar1<'a, '^0.0>; args: [Self, 'a, '^0.0]
context_after:         //     for<'x, 'b> T: Bar1<'^0.0, '^0.1>