what does native="true" stand for in a Qt designer form

I am doing a diff between 2 project versions and noticed that some of the ui files have extra attributes in the xml that开发者_如何学C I have not put there myself:

where would native="true" come from? what would make it get added to the ui?

Qt GUIs can be displayed in many themes. native="true" forces the application to use the operating system's theme (on Linux, some QT apps look terrible because they don't look like the rest of the native apps).