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: whitelist.rs
    path of file: ./repos/namada/crates/ethereum_bridge/src/storage
    
    the code of the file until where you have to start completion: //! ERC20 token whitelist storage data.
//!
//! These storage keys should only ever be written to by governance,
//! or `InitChain`.

use std::str::FromStr;

use namada_core::eth_bridge_pool::
    
    fn test_keys_whitelisted_to_string() {
        let key: storage::Key = Key {
            asset: DAI_ERC20_ETH_ADDRESS,
            suffix: KeyType::Whitelisted,
        }
        .into();
        let expected = "#tnam1quqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqfgdmms/\
                        whitelist/0x6b175474e89094c44da98b954eedeac495271d0f/\
                        whitelisted";
        assert_eq!(expected, key.to_string());
    }