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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 _custom_icon(self, name, **kwargs):
 """Return the custom icon corresponding to the given name."""

        options = dict(_default_options, **kwargs)
        if name in self.painters:
            painter = self.painters[name]
            return self._icon_by_painter(painter, options)
        else:
            return QIcon()