pub type PFN_vkGetRandROutputDisplayEXT = unsafe extern "system" fn(physical_device: PhysicalDevice, dpy: *mut Display, rr_output: RROutput, p_display: *mut DisplayKHR) -> Result;
pub type PFN_vkGetRandROutputDisplayEXT = unsafe extern "system" fn(physical_device: PhysicalDevice, dpy: *mut Display, rr_output: RROutput, p_display: *mut DisplayKHR) -> Result;