code: function cloneWithRaws(node) {
        if (node.nodes) {
          const oldNodes = node.nodes;
          node.nodes = [];
          const clone = node.clone({ raws: node.raws });
          node.nodes = oldNodes;
          for (const clonedChild of oldNodes.map(cloneWithRaws)) {
            clone.append(clonedChild);
          }
          return clone;
        } else {
          return node.clone({ raws: node.raws });
        }
      }
docs: Waiting for https://github.com/postcss/postcss/issues/364