pub type PFN_vkCreateOpticalFlowSessionNV = unsafe extern "system" fn(_device: Device, _create_info: *const OpticalFlowSessionCreateInfoNV, _allocator: *const AllocationCallbacks, _session: *mut OpticalFlowSessionNV) -> Result;pub type PFN_vkCreateOpticalFlowSessionNV = unsafe extern "system" fn(_device: Device, _create_info: *const OpticalFlowSessionCreateInfoNV, _allocator: *const AllocationCallbacks, _session: *mut OpticalFlowSessionNV) -> Result;