OffsetBy
BRect::OffsetBy(BPoint point)
BRect::OffsetBy(float dx, float dy)
BRegion::OffsetBy(const BPoint& point)
BRegion::OffsetBy(int32 x, int32 y)
IntRect::OffsetBy(const IntPoint& point)
IntRect::OffsetBy(int32 dx, int32 dy)