code: public CPUEnum getCpu() {
      if (isReference()) {
        final TargetDef refPlatform = (TargetDef) getCheckedRef(TargetDef.class, "TargetDef");
        return refPlatform.getCpu();
      }
      return this.cpu;
    }
docs: Gets cpu.
  
  @return cpu, may be null.