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/Daft/src/daft-micropartition/src/ops
    
    the code of the file until where you have to start completion: use std::sync::Arc;

use common_error::DaftResult;
use daft_core::Series;
use daft_dsl::Expr;
use daft_io::IOStatsContext;
use daft_table::Table;

use crate::micropartition::MicroPartition;

impl MicroPartition {
  
    
    pub fn argsort(&self, sort_keys: &[Expr], descending: &[bool]) -> DaftResult<Series> {
        let io_stats = IOStatsContext::new("MicroPartition::argsort");

        let tables = self.concat_or_get(io_stats)?;
        match tables.as_slice() {
            [] => {
                let empty_table = Table::empty(Some(self.schema.clone()))?;
                empty_table.argsort(sort_keys, descending)
            }
            [single] => single.argsort(sort_keys, descending),
            _ => unreachable!(),
        }
    }