== 1. A full deep copy: nothing is shared ==
  copy.dept == asha.dept     : false
  copy.skills == asha.skills : false
  asha.skills = [java, spring], asha.dept = Core
  copy.skills = [java], copy.dept = Platform

== 2. transient fields are lost ==
  asha.sessionToken = secret-token
  copy.sessionToken = null

== 3. Sharing INSIDE the graph is preserved ==
  original: same Dept object  : true
  copy    : same Dept object  : true
  copy dept is a new object   : true

== 4. Cycles are handled ==
  cyc.mentor.mentor == cyc : true
  cyc != asha              : true

== 5. A non-serializable field fails at run time ==
  NotSerializableException: java.lang.Object