syntax_data: {"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// associated type for why we don't distinguish [`ty::ClosureKind::Fn`] and
context_before:     /// See the definition of `AsyncFn` and `AsyncFnMut` and the `CallRefFuture`
context_after:     /// [`ty::ClosureKind::FnMut`] for the purpose of the generated MIR bodies.