function isPossibleNumber() {
	const { input, options, metadata } = normalizeArguments(arguments)
	// `parseNumber()` would return `{}` when no phone number could be parsed from the input.
	if (!input.phone && !(options && options.v2)) {
		return false
	}
	return _isPossibleNumber(input, options, metadata)
}
Checks if a given phone number is possible.
Which means it only checks phone number length
and doesn't test any regular expressions.

Examples:

```js
isPossibleNumber('+78005553535', metadata)
isPossibleNumber('8005553535', 'RU', metadata)
isPossibleNumber('88005553535', 'RU', metadata)
isPossibleNumber({ phone: '8005553535', country: 'RU' }, metadata)
```