syntax_data: {"ast_node_type":"other","tokens":[{"end":24,"kind":"keyword","start":0,"text":"}"}]}
source_snippet:                 } else {
context_before:                     ExprKind::Literal { lit, neg: true }
context_after:                     ExprKind::Unary { op: UnOp::Neg, arg: self.mirror_expr(arg) }