syntax_data: {"ast_node_type":"other","tokens":[{"end":14,"kind":"keyword","start":0,"text":"},"}]}
source_snippet:             },
context_before:                 else_opt: else_opt.map(|el| self.mirror_expr(el)),
context_after:             hir::ExprKind::Match(discr, arms, match_source) => ExprKind::Match {