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: sort.rs
    path of file: ./repos/nushell/crates/nu-command/src/filters
    
    the code of the file until where you have to start completion: use alphanumeric_sort::compare_str;
use nu_engine::CallExt;
use nu_protocol::{
    ast::Call,
    engine::{Command, EngineState, Stack},
    record, Category, Exampl
    
    fn signature(&self) -> nu_protocol::Signature {
        Signature::build("sort")
        .input_output_types(vec![(
            Type::List(Box::new(Type::Any)),
            Type::List(Box::new(Type::Any)),
        ), (Type::Record(vec![]), Type::Record(vec![])),])
    .switch("reverse", "Sort in reverse order", Some('r'))
            .switch(
                "ignore-case",
                "Sort string-based data case-insensitively",
                Some('i'),
            )
            .switch(
                "values",
                "If input is a single record, sort the record by values; ignored if input is not a single record",
                Some('v'),
            )
            .switch(
                "natural",
                "Sort alphanumeric string-based values naturally (1, 9, 10, 99, 100, ...)",
                Some('n'),
            )
            .category(Category::Filters)
    }