title: Getting an ABAP object's identity number
body: <p>when inspecting an object-instance in the debugger, it will be printed like this:</p>
  
  <pre><code>{O:9*CLASS=CL_SOMETHING}
  </code></pre>
  
  <p>Is it possible to retrieve that class' identity-number 9 from a given object reference?
  I want to distinguish multiple instances of the same class and print their instance-number.</p>
  
  <p>I found no way using the RTTI to get that information, any advice?</p>