syntax_data: {"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":"branch:"}]}
source_snippet:         branch: MatchTreeBranch<'tcx>,
context_before:         outer_source_info: SourceInfo,
context_after:         fake_borrow_temps: &[(Place<'tcx>, Local, FakeBorrowKind)],