You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: paritydb_weights.rs
    path of file: ./repos/polkadot/runtime/rococo/constants/src/weights
    
    the code of the file until where you have to start completion: // This file is part of Substrate.

// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LIC
    
		fn sane() {
			// At least 1 µs.
			assert!(
				W::get().reads(1).ref_time() >= constants::WEIGHT_REF_TIME_PER_MICROS,
				"Read weight should be at least 1 µs."
			);
			assert!(
				W::get().writes(1).ref_time() >= constants::WEIGHT_REF_TIME_PER_MICROS,
				"Write weight should be at least 1 µs."
			);
			// At most 1 ms.
			assert!(
				W::get().reads(1).ref_time() <= constants::WEIGHT_REF_TIME_PER_MILLIS,
				"Read weight should be at most 1 ms."
			);
			assert!(
				W::get().writes(1).ref_time() <= constants::WEIGHT_REF_TIME_PER_MILLIS,
				"Write weight should be at most 1 ms."
			);
		}