Static kCVImageBufferDisplayMaskRectangle_RectangleHeightKey 

pub unsafe static kCVImageBufferDisplayMaskRectangle_RectangleHeightKey: &'static CFString

Available on crate feature CVImageBuffer only.

Specifies the height of the rectangle starting at rectangle’s top offset toward the rectangle’s bottom edge. The height value is a CFNumber of unsigned 16-bit integer.

See also Apple’s documentation