syntax_data: {"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":")"}]}
source_snippet:     ) -> Option<TestBranch<'tcx>> {
context_before:         sorted_candidates: &FxIndexMap<TestBranch<'tcx>, Vec<&mut Candidate<'tcx>>>,
context_after:         // Find the match_pair for this place (if any). At present,