How to use the @rxweb/reactive-form-validators.ReactiveFormConfig.set function in @rxweb/reactive-form-validators

beforeEach(() => {
      ReactiveFormConfig.set({
        "validationMessage": {
          "hexColor": "Invalid Hex Color format",
        }
      });
    });

beforeEach(() => {
      ReactiveFormConfig.set({
        "validationMessage": {
          "leapYear": "Please enter a valid leap year",
        }
      });
    });

beforeEach(() => {
      ReactiveFormConfig.set({
        "validationMessage": {
          "mac": "Enter valid MAC address.",
        }
      });
    });

beforeEach(() => {
      ReactiveFormConfig.set({
        "validationMessage": {
          "hexColor": "Invalid Hex Color format",
        }
      });
    });

beforeEach(() => {
      ReactiveFormConfig.set({
        "validationMessage": {
          "contains": "input not contain string",
        }
      });
    });

beforeEach(() => {
      ReactiveFormConfig.set({
        "validationMessage": {
          "primeNumber": "Please enter a valid prime number",
        }
      });
    });

beforeEach(() => {
      ReactiveFormConfig.set({
        "validationMessage": {
          "alpha": "Only alphabets are allowed.",
        }
      });
    });

beforeEach(() => {
      ReactiveFormConfig.set({
        "validationMessage": {
          "notEmpty": "This field is required",
        }
      });
    });

beforeEach(() => {
      ReactiveFormConfig.set({
        "validationMessage": {
          "different": "Do not enter same inputs.",
        }
      });
    });

ngOnInit(){
    ReactiveFormConfig.set({
      "validationMessage": {
          "alpha": "Only alphabelts are allowed.",
      }
  });
  }
}