pub type PFN_vkGetPhysicalDeviceXcbPresentationSupportKHR = unsafe extern "system" fn(physical_device: PhysicalDevice, queue_family_index: u32, connection: *mut xcb_connection_t, visual_id: xcb_visualid_t) -> Bool32;
pub type PFN_vkGetPhysicalDeviceXcbPresentationSupportKHR = unsafe extern "system" fn(physical_device: PhysicalDevice, queue_family_index: u32, connection: *mut xcb_connection_t, visual_id: xcb_visualid_t) -> Bool32;