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: slice.rs
    path of file: ./repos/polars/crates/polars-pipe/src/executors/sinks
    
    the code of the file until where you have to start completion: use std::any::Any;
use std::sync::atomic::Ordering;
use std::sync::{Arc, Mutex};

use polars_core::error::PolarsResult;
use polars_core::frame::DataFrame;
use polars_core::schema::SchemaRef;
use polars_utils::atomic::SyncCounter;

use crate::operators::{
    chunks_to_df_unchecked, DataChunk, FinalizedSink, PExecutionContext, Sink, SinkResult,
};

// Ensure the data is return in the order it was streamed
pub struct SliceSink {
   
    
    fn finalize(&mut self, _context: &PExecutionContext) -> PolarsResult<FinalizedSink> {
        self.sort();
        let chunks = std::mem::take(&mut self.chunks);
        let mut chunks = chunks.lock().unwrap();
        let chunks: Vec<DataChunk> = std::mem::take(chunks.as_mut());
        if chunks.is_empty() {
            return Ok(FinalizedSink::Finished(DataFrame::from(
                self.schema.as_ref(),
            )));
        }

        let df = chunks_to_df_unchecked(chunks);
        let offset = self.offset.load(Ordering::Acquire) as i64;

        // drop the counters
        unsafe {
            self.offset.manual_drop();
            self.current_len.manual_drop();
        }

        Ok(FinalizedSink::Finished(df.slice(offset, self.len)))
    }