{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"///"}]}
/// and both have an expression associated, however for diagnostics we prefer reporting
/// `CaptureKind` associated with both `E1` and `E2` will be ByRef(MutBorrow),
/// `E1` since it appears earlier in the closure body. When `E2` is being processed we