pub unsafe extern "C" fn CGGetDisplaysWithOpenGLDisplayMask(
mask: CGOpenGLDisplayMask,
maxDisplays: u32,
displays: *mut CGDirectDisplayID,
matchingDisplayCount: *mut u32
) -> CGErrorpub unsafe extern "C" fn CGGetDisplaysWithOpenGLDisplayMask(
mask: CGOpenGLDisplayMask,
maxDisplays: u32,
displays: *mut CGDirectDisplayID,
matchingDisplayCount: *mut u32
) -> CGError