code: public final <U> Mono<U> ofType(final Class<U> clazz) {
  		Objects.requireNonNull(clazz, "clazz");
  		return filter(o -> clazz.isAssignableFrom(o.getClass())).cast(clazz);
  	}
docs: Evaluate the emitted value against the given {@link Class} type. If the
  value matches the type, it is passed into the new {@link Mono}. Otherwise the
  value is ignored.
  
  <p>
  <img class="marble" src="doc-files/marbles/ofTypeForMono.svg" alt="">
  
  @param clazz the {@link Class} type to test values against
  
  @return a new {@link Mono} filtered on the requested type