docs: public static void setDebugMode(boolean b) {
          debugMode = Boolean.valueOf( b );
          if (debugMode) {
              if (!MVELRuntime.hasDebuggerContext()) {
                  MVELRuntime.setThreadDebugger(new MVELDebugger());
              }
          } else {
              MVELRuntime.resetDebugger();
          }
          System.setProperty( DEBUG_LAUNCH_KEY, debugMode.toString());
      }