code: @Nullable
  	public String getValueFrom(MethodParameter parameter) {
  
  		Assert.notNull(parameter, "MethodParameter must not be null!");
  		Annotation annotation = parameter.getParameterAnnotation(annotationType);
  		return annotation == null ? null : getValueFrom(annotation);
  	}
docs: Reads the {@link Annotation} attribute's value from the given {@link MethodParameter}.
  
  @param parameter must not be {@literal null}.
  @return