@classmethod
def fromkeys(cls, *args, verify=True, mutable=True, **kwargs):
    """Initialise a header from keyword values.

        Like fromvalues, but without any interpretation of keywords.

        Note that this just passes kwargs to the class initializer as a dict
        (for compatibility with fits.Header). It is present for compatibility
        with other header classes only.
        """
    return cls(kwargs, *args, verify=verify, mutable=mutable)
