title: BeanUtils Converter custom class with nested objects
body: <p>I need to copy the properties from one bean to another with same properties names.
  I found the class BeanUtils and method copyProperties().
  The problem is that in my beans there are nested objects.
  So I tried to create a custom converter (implementing Converter interface) but I don't know how to map objects inside other objects and I don't know what I have to put inside the implementation of method convert().
  I haven't found any solution for this problem.</p>
  
  <p>Can you help me?</p>
  
  <p>Regards.</p>