src/language-js/print/module.js/printModuleSource
function printModuleSource(path, options, print) {
  const node = path.getValue();

  if (!node.source) {
    return "";
  }

  /** @type{Doc[]} */
  const parts = [];
  if (!shouldNotPrintSpecifiers(node, options)) {
    parts.push(" from");
  }
  parts.push(" ", path.call(print, "source"));

  return concat(parts);
}