{"ast_node_type":"other","tokens":[{"end":125,"kind":"keyword","start":0,"text":"//"}]}
        // For the purposes of this function, we hope that it is a `struct` type, and that our current `expr` is a literal of
        // This is the "trait" (meaning, the predicate "proved" by this `impl`) which provides the `Self` type we care about.
        // that struct type.