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;