computes the upper and lower gradient colors for the inner box from a widget theme and the widgets state. If flipActive is set and the state is BND_ACTIVE, the upper and lower colors will be swapped.
The D Programming Language's Unofficial Docs
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computes the upper and lower gradient colors for the inner box from a widget theme and the widgets state. If flipActive is set and the state is BND_ACTIVE, the upper and lower colors will be swapped.