syntax_data: {"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"PatKind::DerefPattern"}]}
source_snippet:                 PatKind::DerefPattern { subpattern: self.lower_pattern(subpattern), borrow }
context_before:                 let borrow = self.typeck_results.deref_pat_borrow_mode(ty, subpattern);
context_after:             }