code: public WeakReference<ProfileReport> getReportLastThread() {
  	   Accumulator acc = lastAccumulator.get();
  
  	   return acc == null ? null : acc.reportRef;
     }
docs: Retrieves the most recent complete report available for the last thread that executed this KernelDeviceProfile
  instance respective kernel and device.<br/>
  <b>Note1: </b>If the profile report is intended to be kept in memory, the object should be cloned with
  {@link com.aparapi.ProfileReport#clone()}<br/>
  
  @return <ul><li>the profiling report for the current most recent execution</li>
  <li>null, if no profiling report is available yet</li></ul>