{"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":".trim_start(comma_tok.span.shrink_to_lo())"}]}
                            .trim_start(comma_tok.span.shrink_to_lo())
                            .span_extend_to_line(comma_tok.span)
                            .map(|s| self.psess.source_map().span_until_non_whitespace(s));