syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // without the implied bounds. Consider a closure
context_before:                 // capture the signature and it may not be WF
context_after:                 // like `|x: &'a T|` -- it may be that `T: 'a` is