Get the an item response for the given item_type and id

        :param item_type str: A valid item-type
        :param id str: The id of the item
        :returns: :py:Class:`planet.api.models.JSON`
        :raises planet.api.exceptions.APIException: On API error.

def get_item(self, item_type, id):
        '''Get the an item response for the given item_type and id

        :param item_type str: A valid item-type
        :param id str: The id of the item
        :returns: :py:Class:`planet.api.models.JSON`
        :raises planet.api.exceptions.APIException: On API error.
        '''
        url = 'data/v1/item-types/%s/items/%s' % (item_type, id)
        return self._get(url).get_body()