syntax_data: {"ast_node_type":"function","tokens":[{"end":78,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn lower_pattern(&mut self, pat: &'tcx hir::Pat<'tcx>) -> Box<Pat<'tcx>> {
context_before: impl<'a, 'tcx> PatCtxt<'a, 'tcx> {
context_after:         let adjustments: &[PatAdjustment<'tcx>] =