pub type PFN_vkGetImageSparseMemoryRequirements = unsafe extern "system" fn(_device: Device, _image: Image, _sparse_memory_requirement_count: *mut u32, _sparse_memory_requirements: *mut SparseImageMemoryRequirements);
https://www.khronos.org/registry/vulkan/specs/latest/man/html/vkGetImageSparseMemoryRequirements.html