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: len.rs
    path of file: ./repos/Daft/src/daft-core/src/array/ops
    
    the code of the file until where you have to start completion: use crate::{
    array::{DataArray, FixedSizeListArr
    
    pub fn size_bytes(&self) -> DaftResult<usize> {
        use pyo3::prelude::*;
        use pyo3::types::PyList;

        let vector = self.as_arrow().values().to_vec();
        Python::with_gil(|py| {
            let daft_utils = PyModule::import(py, pyo3::intern!(py, "daft.utils"))?;
            let estimate_size_bytes_pylist =
                daft_utils.getattr(pyo3::intern!(py, "estimate_size_bytes_pylist"))?;
            let size_bytes: usize = estimate_size_bytes_pylist
                .call1((PyList::new(py, vector),))?
                .extract()?;
            Ok(size_bytes)
        })
    }