syntax_data: {"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"hir::Mutability::Mut"}]}
source_snippet:                     hir::Mutability::Mut => BorrowKind::Mut { kind: mir::MutBorrowKind::Default },
context_before:                 let borrow_kind = match mutbl {
context_after:                     hir::Mutability::Not => BorrowKind::Shared,