{"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"(self.expr_span.shrink_to_hi().to(self.cast_span),"}]}
                                (self.expr_span.shrink_to_hi().to(self.cast_span), ")".to_string()),
                                (self.expr_span.shrink_to_lo(), "char::from_u32(".to_string()),
                            ],