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