{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"//"}]}
            // FIXME(deref_patterns): we'll get better diagnostics for users trying to
            // For simplicity, only apply overloaded derefs if `expected` is a known ADT.
            // implicitly deref generics if we allow them here, but primitives, tuples, and