src/language-js/print/decorators.js/printClassMemberDecorators
function printClassMemberDecorators(path, options, print) {
  const node = path.getValue();
  return group([
    join(line, path.map(print, "decorators")),
    hasNewlineBetweenOrAfterDecorators(node, options) ? hardline : line,
  ]);
}