isPristine(checkOnlyRawValue = true) {
        let result;
        if (checkOnlyRawValue) {
            result = this.initialValue === this.getNumericString();
        } else {
            result = this.initialValueHtmlAttribute === this.getFormatted();
        }

        return result;
    }
Return `true` if the current value is the same as when the element got initialized.
Note: By default, this returns `true` if the raw unformatted value is still the same even if the formatted one has changed (due to a configuration update for instance).
In order to test if the formatted value is the same (which means neither the raw value nor the settings have been changed), then you must pass `false` as its argument.

@param {boolean} checkOnlyRawValue If set to `true`, the pristine value is done on the raw unformatted value, not the formatted one.  If set to `false`, this also checks that the formatted value hasn't changed.
@returns {boolean}