syntax_data: {"ast_node_type":"impl","tokens":[{"end":79,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// handle `<T as Trait>::Assoc` and `impl Trait`). You almost certainly do
context_before:     /// This is parameterized over the normalization strategy (i.e. how to
context_after:     /// **NOT** want to pass the identity function here, unless you know what