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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 check_dataset(self, dataset_id, project_id=None):
 """Check to see if a dataset exists. Parameters dataset_id : str Dataset unique id project_id: str, optional The project the dataset is in Returns ------- bool True if dataset at `dataset_id` exists, else Fasle """
       
        dataset = self.get_dataset(dataset_id, project_id)
        return bool(dataset)