code: public static void copyExternalAssets(AbstractWisdomMojo mojo, MavenResourcesFiltering filtering) throws IOException {
          File in = new File(mojo.basedir, Constants.ASSETS_SRC_DIR);
          if (!in.exists()) {
              return;
          }
          File out = new File(mojo.getWisdomRootDirectory(), Constants.ASSETS_DIR);
          filterAndCopy(mojo, filtering, in, out);
      }
docs: Copies the external assets from "src/main/assets" to "wisdom/assets". Copied resources are filtered.
  
  @param mojo      the mojo
  @param filtering the component required to filter resources
  @throws IOException if a file cannot be copied