<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _initialize_expectations(self, config=None, data_asset_name=None):
 """Override data_asset_type with "Dataset" """

        super(Dataset, self)._initialize_expectations(config=config, data_asset_name=data_asset_name)
        self._expectations_config["data_asset_type"] = "Dataset"