docs: public static void t(Class<?> clz) {
          // Must be non null and type of interest.
          if (clz == null || ClassesCache.check(clz) || Types.isIgnorable(clz)) {
              return;
          }
  
          // Check and assign id to this class (this must be synchronized).
          try {
              sLock.lock();
              if (!sClasses.add(clz)) {
                  return;
              }
          } finally {
              sLock.unlock();
          }
  
          String className = clz.getName();
          String resourceName = className.substring(className.lastIndexOf(".") + 1).concat(".class");
          URL url = null;
          try {
              // Find resource for the class (URL that we will use to extract
              // the path).
              url = clz.getResource(resourceName);
          } catch (SecurityException ex) {
              Log.w("Unable to obtain resource because of security reasons.");
          }
          // If no URL obtained, return.
          if (url == null) {
              return;
          }
          recordURL(url.toExternalForm());
      }