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fix type error when class_name none
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@ -31,7 +31,7 @@ def icon_for_window(window):
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else:
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# xwayland support
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class_name = window.window_class
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if len(class_name) > 0:
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if class_name is not None and len(class_name) > 0:
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class_name = class_name.lower()
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if class_name in WINDOW_ICONS:
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return WINDOW_ICONS[class_name]
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