syntax_data: {"ast_node_type":"other","tokens":[{"end":26,"kind":"keyword","start":0,"text":"match"}]}
source_snippet:     match ref_mutability {
context_before: pub(crate) fn ref_pat_borrow_kind(ref_mutability: Mutability) -> BorrowKind {
context_after:         Mutability::Mut => BorrowKind::Mut { kind: MutBorrowKind::Default },