code: function setClosing(tokenOrLexer) {
      metaObj.endLine = tokenOrLexer.line;
      metaObj.endCol = tokenOrLexer.col;
  
      // whitespace or comments that preceded the end token
      // (e.g. on a () list whitespace or comments that preceded ")")
      metaObj.endPrelude = tokenOrLexer.prelude;
    }
docs: Set the closing line/col for a list from the closing token (e.g. ")")