code: public final void setGeneratingDebug(boolean generatingDebug)
      {
          if (sealed) onSealedMutation();
          generatingDebugChanged = true;
          if (generatingDebug && getOptimizationLevel() > 0)
              setOptimizationLevel(0);
          this.generatingDebug = generatingDebug;
      }
docs: Specify whether or not debug information should be generated.
  <p>
  Setting the generation of debug information on will set the
  optimization level to zero.
  @since 1.3