syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: /// to make a callable [`ty::FnSig`] suitable for typeck and borrowck.
context_before: /// See [`CoroutineClosureSignature`] for how these arguments are put together
context_after: pub struct CoroutineClosureArgsParts<I: Interner> {