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: keccak.rs
    path of file: ./repos/parity-ethereum/ethash/src
    
    the code of the file until where you have to start completion: // Copyright 2015-2020 Parity Techno
    
	pub fn inplace(input: &mut [u8]) {
		// This is safe since `keccak_*` uses an internal buffer and copies the result to the output. This
		// means that we can reuse the input buffer for both input and output.
		unsafe {
			hash::keccak_256_unchecked(input.as_mut_ptr(), input.len(), input.as_ptr(), input.len());
		}
	}