pub type PFN_vkDestroyDescriptorSetLayout = unsafe extern "system" fn(_device: Device, _descriptor_set_layout: DescriptorSetLayout, _allocator: *const AllocationCallbacks);pub type PFN_vkDestroyDescriptorSetLayout = unsafe extern "system" fn(_device: Device, _descriptor_set_layout: DescriptorSetLayout, _allocator: *const AllocationCallbacks);