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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 _get_included_diff_results(self):
 """ Return a list of stages to be included in the diff results. """

        included = [self._git_diff_tool.diff_committed(self._compare_branch)]
        if not self._ignore_staged:
            included.append(self._git_diff_tool.diff_staged())
        if not self._ignore_unstaged:
            included.append(self._git_diff_tool.diff_unstaged())

        return included