[Qt-interest] Unified ToolBar question

[phas]

Hello.
I have a question of QToolBar.

I setted stylesheet.

QToolBar {
	margin: 0px;
	padding: 0px;
	spacing: 0px;
}

QToolBar QToolButton {
	margin: 0px;
	padding: 0px;
	spacing: 0px;
}

and used "QToolBar::setUnifiedTitleAndToolBarOnMac".
please, see captured image.
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"Normal QToolBar" has no space outside of QToolButton.
But "Unified QToolBar" has some spaces about 5px at bottom.

How set Unified QToolBar like Cocoa Application?