src/language-js/embed/css.js/format
function format(path, print, textToDoc) {
  const node = path.getValue();

  // Get full template literal with expressions replaced by placeholders
  const rawQuasis = node.quasis.map((q) => q.value.raw);
  let placeholderID = 0;
  const text = rawQuasis.reduce((prevVal, currVal, idx) => {
    return idx === 0
      ? currVal
      : prevVal + "@prettier-placeholder-" + placeholderID++ + "-id" + currVal;
  }, "");
  const doc = textToDoc(
    text,
    { parser: "scss" },
    { stripTrailingHardline: true }
  );
  const expressionDocs = printTemplateExpressions(path, print);
  return transformCssDoc(doc, node, expressionDocs);
}