Angular reactive forms set and clear validators

Please assist, I want to remove all validators in form, Please advise whether it's possible or not and if not, what's the better way to remove validators if you have a form Group of 20 or more form controls, see example below.

ngOnInit() {
this.exampleFormGroup = this.formBuilder.group({
surname: ['', [Validators.required, Validators.pattern('^[\\w\\s/-/(/)]{3,50}$')]],
initials: ['', [Validators.required, Validators.maxLength(4)]]
});
}

public removeValidators() {
this.exampleFormGroup.get('surname').clearValidators();
this.exampleFormGroup.get('initials').clearValidators();
this.exampleFormGroup.updateValueAndValidity();
}

public addValidators() {
this.exampleFormGroup .get('surname').setValidators([Validators.required,Validators.pattern('^[\\w\\s/-/(/)]{3,50}$')]);
this.exampleFormGroup.get('initials').setValidators([Validators.required, Validators.maxLength(4)]);
this.exampleFormGroup.updateValueAndValidity();
}


The above method addValidators() will add validators and removeValidators() will remove validators when executed. But the problem I have is, I have to specify the form control I'm trying to clear validators. Is there a way to just do this.exampleFormGroup.clearValidators(); and clear all in the form and again this.exampleFormGroup.setValidators() to set them back? I know I may be asking for a unicorn, but in a scenario where the formGroup has 20 or more controls, clearing and setting validators can be painful, so a map on how to handle such scenarios will be much appreciated.

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