Function vkCreateHeadlessSurfaceEXT 

pub unsafe extern "system" fn vkCreateHeadlessSurfaceEXT(
    instance: VkInstance,
    pCreateInfo: *const VkHeadlessSurfaceCreateInfoEXT,
    pAllocator: *const VkAllocationCallbacks,
    pSurface: *mut VkSurfaceKHR,
) -> VkResult