syntax_data: {"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"Mutability::Not"}]}
source_snippet:             Mutability::Not => BorrowKind::Mut { kind: MutBorrowKind::ClosureCapture },
context_before:         let borrow_kind = match mutability {
context_after:             Mutability::Mut => BorrowKind::Mut { kind: MutBorrowKind::Default },