pub type PFN_vkDestroyValidationCacheEXT = unsafe extern "system" fn(_device: Device, _validation_cache: ValidationCacheEXT, _allocator: *const AllocationCallbacks);pub type PFN_vkDestroyValidationCacheEXT = unsafe extern "system" fn(_device: Device, _validation_cache: ValidationCacheEXT, _allocator: *const AllocationCallbacks);