docs: public void refresh() {
          this.productProperties = new Properties();
          FileInputStream fis = null;
          try {
              fis = new FileInputStream(new File(this.installDir, PRODUCT_PROPERTIES_PATH));
              this.productProperties.load(fis);
          } catch (Exception e) {
          } finally {
              InstallUtils.close(fis);
          }
          featureDefs = null;
          installFeatureDefs = null;
          mfp = null;
      }