type PFN_vkGetPhysicalDeviceSparseImageFormatProperties = unsafe extern "system" fn(_: VkPhysicalDevice, _: VkFormat, _: VkImageType, _: VkSampleCountFlagBits, _: VkImageUsageFlags, _: VkImageTiling, _: *mut u32, _: *mut VkSparseImageFormatProperties);