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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 cache(self, domain, data_type, ttl_minutes=None, mapping=None):
 """Get instance of the Cache module. Args: domain (str):
 The domain can be either "system", "organization", or "local". When using "organization" the data store can be accessed by any Application in the entire org, while "local" access is restricted to the App writing the data. The "system" option should not be used in almost all cases. data_type (str):
 The data type descriptor (e.g., tc:whois:cache). ttl_minutes (int):
 The number of minutes the cache is valid. Returns: object: An instance of the Cache Class. """

        from .tcex_cache import TcExCache

        return TcExCache(self, domain, data_type, ttl_minutes, mapping)