{"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"hir::BindingMode::Ref(Mutability::Mut)"}]}
                hir::BindingMode::Ref(Mutability::Mut) => Some("ref mut"),
                hir::BindingMode::Move => None,
                hir::BindingMode::Ref(Mutability::Shared) => Some("ref"),