Removes empty rows from dataset... I am still wanting to use this???

        :param key: the dataset to trim
        :type key: str

def trim(self, key):
        """
        Removes empty rows from dataset... I am still wanting to use this???

        :param key: the dataset to trim
        :type key: str
        """
        current_index = self.meta[key]['cursor']
        self.hdf5[key].resize(current_index, axis=0)