code: public static boolean isPresent(String name, @Nullable ClassLoader classLoader) {
          return forName(name, classLoader).isPresent();
      }
docs: Check whether the given class is present in the given classloader.
  
  @param name        The name of the class
  @param classLoader The classloader. If null will fallback to attempt the thread context loader, otherwise the system loader
  @return True if it is