syntax_data: {"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// `fn(&'static ())` are different types and have to be treated as such.
context_before:     /// selection and the `TypeId` of that type. `for<'a> fn(&'a ())` and
context_after:     ReBound(DebruijnIndex, I::BoundRegion),