syntax_data: {"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"//"}]}
source_snippet: // FIXME(async_closures): Get rid of this in favor of `BoundVarReplacerDelegate`
context_before: /// Instantiates a `for<'env> ...` binder with a specific region.
context_after: // when that is uplifted.