_getCountry() {
		const { country } = this.state
		/* istanbul ignore if */
		if (USE_NON_GEOGRAPHIC_COUNTRY_CODE) {
			// `AsYouType.getCountry()` returns `undefined`
			// for "non-geographic" phone numbering plans.
			if (country === '001') {
				return
			}
		}
		return country
	}
Returns a two-letter country code of the phone number.
Returns `undefined` for "non-geographic" phone numbering plans.
@return {string} [country]