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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 merge(self, other):
 """ Merges this node with the other, returning a new node that spans the both. """

        new_node = self.copy()
        new_node.size += other.size
        new_node.instruction_addrs += other.instruction_addrs
        # FIXME: byte_string should never be none, but it is sometimes
        # like, for example, patcherex test_cfg.py:test_fullcfg_properties
        if new_node.byte_string is None or other.byte_string is None:
            new_node.byte_string = None
        else:
            new_node.byte_string += other.byte_string
        return new_node