'Initialize the NumberInstance
:returns: twilio.rest.pricing.v1.voice.number.NumberInstance
:rtype: twilio.rest.pricing.v1.voice.number.NumberInstance'

def __init__(self, version, payload, number=None):

    super(NumberInstance, self).__init__(version)
    self._properties = {'number': payload['number'], 'country': payload['country'], 'iso_country': payload['iso_country'], 'outbound_call_price': payload['outbound_call_price'], 'inbound_call_price': payload['inbound_call_price'], 'price_unit': payload['price_unit'], 'url': payload['url']}
    self._context = None
    self._solution = {'number': (number or self._properties['number'])}
