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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 datastore(self, domain, data_type, mapping=None):
 """Get instance of the DataStore 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). Returns: object: An instance of the DataStore Class. """

        from .tcex_datastore import TcExDataStore

        return TcExDataStore(self, domain, data_type, mapping)