{"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"//"}]}
            // EOF, don't want to point at the following char, but rather the last token.
            _ if self.prev_token.span == DUMMY_SP => (self.token.span, self.token.span),
            (token::Eof, None) => (self.prev_token.span, self.token.span),