phonenumbers.go
func (ipn *IncomingNumberService) Get(ctx context.Context, sid string) (*IncomingPhoneNumber, error) {
	number := new(IncomingPhoneNumber)
	err := ipn.client.GetResource(ctx, numbersPathPart, sid, number)
	return number, err
}
func (ipn *IncomingNumberService) Get(ctx context.Context, sid string) (*IncomingPhoneNumber, error) {
	number := new(IncomingPhoneNumber)
	err := ipn.client.GetResource(ctx, numbersPathPart, sid, number)
	return number, err
}
// Get retrieves a single IncomingPhoneNumber.