StyleSheet for QPushButton's icon and label

It would be better if QPushButton's icon and label components be styleable independently from QPushButton, like QPushButton::icon and QPushButton::label. For example, I want to move the icon on the top-right corner of the button, but it is not possible using icon feature of QPushButton.

There are some workarounds like subclassing QPushButton but it would be better to support stylesheets of label and icon components of QPushButton independently.