code: public Integer findIntValue(JvmAnnotationTarget op, Class<? extends Annotation> annotationType) {
  		final JvmAnnotationReference reference = this.lookup.findAnnotation(op, annotationType);
  		if (reference != null) {
  			return findIntValue(reference);
  		}
  		return null;
  	}
docs: Extract the integer value of the given annotation, if it exists.
  
  @param op the annotated element.
  @param annotationType the type of the annotation to consider
  @return the value of the annotation, or {@code null} if no annotation or no
  value.
  @since 0.6