How to use the yarn.resourcemanager.hostname.rm2 function in yarn

_getRmAdditionalDependencies: function (configs) {
    var ret = {};
    var rm1 = configs['yarn-site']['yarn.resourcemanager.hostname.rm1'];
    if (rm1) {
      ret.rm1 = rm1;
    }
    var rm2 = configs['yarn-site']['yarn.resourcemanager.hostname.rm2'];
    if (rm2) {
      ret.rm2 = rm2;
    }
    return ret;
  },

setSpecificResourceMangerConfigs: function (configs, targetHostName) {
    var sourceHostName = this.get('content.reassignHosts.source');

    if (App.get('isRMHaEnabled')) {
      if (configs['yarn-site']['yarn.resourcemanager.hostname.rm1'] === sourceHostName) {
        configs['yarn-site']['yarn.resourcemanager.hostname.rm1'] = targetHostName;
      } else {
        configs['yarn-site']['yarn.resourcemanager.hostname.rm2'] = targetHostName;
      }
    }
  },