code: public boolean checkCleanStart() {
          String fwClean = get(BootstrapConstants.INITPROP_OSGI_CLEAN);
          if (fwClean != null && fwClean.equals(BootstrapConstants.OSGI_CLEAN_VALUE)) {
              return true;
          }
  
          String osgiClean = get(BootstrapConstants.OSGI_CLEAN);
          return Boolean.valueOf(osgiClean);
      }
docs: Check osgi clean start properties, ensure set correctly for clean start
  
  @see forceCleanStart