code: @Override
    public Configuration getMainConfiguration() {
  
      return Tang.Factory.getTang().newConfigurationBuilder()
              .bindImplementation(RuntimeClasspathProvider.class, YarnClasspathProvider.class)
              .bindConstructor(org.apache.hadoop.yarn.conf.YarnConfiguration.class, YarnConfigurationConstructor.class)
              .build();
    }
docs: Generates configuration that allows multi runtime to run on Yarn.
  MultiRuntimeMainConfigurationGenerator.
  @return Instance of <code>Configuration</code>