syntax_data: {"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // FIXME(valtrees): Accept `ty::Value` instead of `Ty` and `ty::ValTree` separately.
context_before:     // Recursive helper for `to_pat`; invoke that (instead of calling this directly).
context_after:     #[instrument(skip(self), level = "debug")]