code: @Nonnull
    public static String extractClassName(@Nonnull final String canonicalJavaClassName) {
      final int lastDot = canonicalJavaClassName.lastIndexOf('.');
      if (lastDot < 0) {
        return canonicalJavaClassName.trim();
      }
      return canonicalJavaClassName.substring(lastDot + 1).trim();
    }
docs: Extract class name from canonical Java class name
  
  @param canonicalJavaClassName canonical class name (like 'a.b.c.SomeClassName'), must not be null
  @return extracted class name, must not be null but can be empty for case "a.b.c.d."