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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_all_code_styles():
 """ Return a mapping from style names to their classes. """

    result = dict((name, style_from_pygments_cls(get_style_by_name(name))) for name in get_all_styles())
    result['win32'] = Style.from_dict(win32_code_style)
    return result