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: bytes_output.rs
    path of file: ./repos/rucene/src/core/util/fst
    
    the code of the file until where you have to start completion: // Copyright 2019 Zhizhesihai (Beijing) Technology Limited.
//
// 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/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on a
    
    fn prefix(&self, other: &ByteSequenceOutput) -> ByteSequenceOutput {
        let mut pos1 = 0;
        let mut pos2 = 0;
        let stop = min(self.bytes.len(), other.bytes.len());

        while pos1 < stop {
            if self.bytes[pos1] != other.bytes[pos2] {
                break;
            }

            pos1 += 1;
            pos2 += 1;
        }

        if pos1 == 0 {
            // No common prefix
            ByteSequenceOutput::empty()
        } else if pos1 == self.bytes.len() {
            // self.bytes is a prefix of other
            self.clone()
        } else if pos2 == other.bytes.len() {
            // other is a prefix of prefix
            other.clone()
        } else {
            ByteSequenceOutput::new(self.bytes[0..pos1].to_vec())
        }
    }