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: mod.rs
    path of file: ./repos/webrtc/webrtc/src/rtp_transceiver/rtp_sender
    
    the code of the file until where you have to start completion: #[cfg(test)]
mod rtp_sender_test;

use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::{Arc, Weak};

use ice::rand::generate_crypto_random_string;
use interceptor::stream_info::StreamInfo;
use interceptor:
    
    pub(crate) fn associate_media_stream_id(&self, id: String) -> bool {
        let mut lock = self.associated_media_stream_ids.lock().unwrap();

        if lock.contains(&id) {
            return false;
        }

        lock.push(id);

        true
    }