code: public boolean isAssigned()
      {
          boolean ret = false;
          try {
              ret = hasChildPerson(Context.getThreadContext().getPerson());
          } catch (final EFapsException e) {
              AbstractUserObject.LOG.error("could not read Person ", e);
          }
          return ret;
      }
docs: Checks, if the context user is assigned to this user object. The instance
  method uses {@link #hasChildPerson} to test this.
  
  @see #hasChildPerson
  @return true if person is assigned