Used in Color Palette Client example in QtDoc
The sources can be found in qtdoc/examples/demos/colorpaletteclient/icons/colorpaletteclient/20x20, qtdoc/examples/demos/colorpaletteclient/icons/colorpaletteclient/20x20@2, qtdoc/examples/demos/colorpaletteclient/icons/colorpaletteclient/20x20@3, and qtdoc/examples/demos/colorpaletteclient/icons/colorpaletteclient/20x20@4.
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