def METHOD_NAME(self):
    """The variable dtype of this policy.
    This is the dtype layers will create their variables in, unless a layer
    explicitly chooses a different dtype. If this is different than
    `DTypePolicy.compute_dtype`, Layers will cast variables to
    the compute dtype to avoid type errors.
    Variable regularizers are run in the variable dtype, not the compute
    dtype.
    Returns:
        The variable dtype of this policy, as a string.
    """
    return self._variable_dtype