syntax_data: {"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // `dyn for<'a> Foo<'a, Bar = &'a ()>`. When we mangle this, the
context_before:         // Okay, so this is a bit tricky. Imagine we have a trait object like
context_after:         // output looks really close to the syntax, where the `Bar = &'a ()` bit