docs: public <U> BeanObservables<U> property(String propertyName, Class<U> propertyType)
  	{
  		BeanObservablesDecorator<U> property = new BeanObservablesDecorator<U>();
  		
  		property.setDelegate(compose(this, propertyFactoryT(property, propertyName, propertyType)));
  		
  		return property;
  	}