def get_target(self, offset, extended_arg=0):
        """
        Get next instruction offset for op located at given <offset>.
        NOTE: extended_arg is no longer used
        """
        inst = self.get_inst(offset)
        if inst.opcode in self.opc.JREL_OPS | self.opc.JABS_OPS:
            target = inst.argval
        else:
            # No jump offset, so use fall-through offset
            target = next_offset(inst.opcode, self.opc, inst.offset)
        return target
Get next instruction offset for op located at given <offset>.
        NOTE: extended_arg is no longer used