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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 _to_snippet(self, cfg_node=None, addr=None, size=None, thumb=False, jumpkind=None, base_state=None):
 """ Convert a CFGNode instance to a CodeNode object. :param angr.analyses.CFGNode cfg_node: The CFGNode instance. :param int addr: Address of the node. Only used when `cfg_node` is None. :param bool thumb: Whether this is in THUMB mode or not. Only used for ARM code and when `cfg_node` is None. :param str or None jumpkind: Jumpkind of this node. :param SimState or None base_state: The state where BlockNode should be created from. :return: A converted CodeNode instance. :rtype: CodeNode """


        if cfg_node is not None:
            addr = cfg_node.addr
            size = cfg_node.size
            thumb = cfg_node.thumb
        else:
            addr = addr
            size = size
            thumb = thumb

        if addr is None:
            raise ValueError('_to_snippet(): Either cfg_node or addr must be provided.')

        if self.project.is_hooked(addr) and jumpkind != 'Ijk_NoHook':
            hooker = self.project._sim_procedures[addr]
            size = hooker.kwargs.get('length', 0)
            return HookNode(addr, size, type(hooker))

        if cfg_node is not None:
            return BlockNode(addr, size, thumb=thumb, bytestr=cfg_node.byte_string)  # pylint: disable=no-member
        else:
            return self.project.factory.snippet(addr, size=size, jumpkind=jumpkind, thumb=thumb,
                                                backup_state=base_state)