code: private Configuration buildVersionConfig() {
  
          // Inject the library version
          String jersey2ToolkitVersion = Jersey2ToolkitConfig.class
                  .getPackage().getImplementationVersion();
  
          HashMap<String, Object> versionConfigMap = new HashMap<>();
          versionConfigMap.put("jersey2-toolkit.version", jersey2ToolkitVersion);
  
          return new MapConfiguration(versionConfigMap);
      }
docs: Creates a configuration object that contains the current version of the
  jersey2-toolkit library in use.
  
  @return A configuration instance with jersey2-toolkit.version set.