syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// types may mean that `'a` and `'b` don't appear in the results,
context_before:     /// Trait>::Foo` and `<&'b u32 as Trait>::Foo`, normalizing those
context_after:     /// so they are not considered *constrained*.