syntax_data: {"ast_node_type":"other","tokens":[{"end":21,"kind":"keyword","start":0,"text":"match"}]}
source_snippet:         match *self {
context_before:     fn to_borrow_kind(&self) -> BorrowKind {
context_after:             hir::Mutability::Mut => BorrowKind::Mut { kind: mir::MutBorrowKind::Default },