pub type PFN_vkGetDeferredOperationMaxConcurrencyKHR = unsafe extern "system" fn(_device: Device, _operation: DeferredOperationKHR) -> u32;pub type PFN_vkGetDeferredOperationMaxConcurrencyKHR = unsafe extern "system" fn(_device: Device, _operation: DeferredOperationKHR) -> u32;