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: encode.rs
    path of file: ./repos/nushell/crates/nu-command/src/strings/encode_decode
    
    the code of the file until where you have to start completion: use nu_engine::CallExt;
use nu_protocol::ast::Call;
use nu_protocol::engine::{Command, EngineState, Stack};
use nu_protocol::{
    Category, Example, I
    
    fn extra_usage(&self) -> &str {
        r#"Multiple encodings are supported; here are a few:
big5, euc-jp, euc-kr, gbk, iso-8859-1, cp1252, latin5

Note that since the Encoding Standard doesn't specify encoders for utf-16le and utf-16be, these are not yet supported.

For a more complete list of encodings, please refer to the encoding_rs
documentation link at https://docs.rs/encoding_rs/latest/encoding_rs/#statics"#
    }