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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def DomainTokensGet(self, domain_id):

 """
 T his method returns the list of tokens which are available for this domain. 
 Only domain managers can list domain tokens.
 
 @param domain_id - ID of the domain for which to retrieve tokens
 
 @return (bool) - Boolean indicating whether DomainTokensGet was successful
 """

        if self.__SenseApiCall__('/domains/{0}/tokens.json'.format(domain_id), 'GET'):
            return True
        else:
            self.__error__ = "api call unsuccessful"
            return False