def focus(self, cli, buffer_name):
        assert isinstance(buffer_name, six.text_type)
        self.focus_stack = [buffer_name]
Return the new version of a parameter dictionary.
dataset/ETHPy150Open jonathanslenders/python-prompt-toolkit/prompt_toolkit/buffer_mapping.py/BufferMapping.focus--crossover with--dataset/ETHPy150Open ganeti/ganeti/lib/cmdlib/common.py/GetUpdatedParams