'Create a copy of a |ASN.1| type or object.
Any parameters to the *clone()* method will replace corresponding
properties of the |ASN.1| object.
Parameters
value: :class:`str` or |ASN.1| object
Initialization value to pass to new ASN.1 object instead of
inheriting one from the caller.
tagSet: :py:class:`~pyasn1.type.tag.TagSet`
Object representing ASN.1 tag(s) to use in new object instead of inheriting from the caller
Returns
: :py:class:`~pyasn1.type.univ.Null`
new instance of NULL type/value'

def clone(self, value=noValue, tagSet=None):

    return OctetString.clone(self, value, tagSet)
