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: neon_mj.rs
    path of file: ./repos/cube/packages/cubejs-backend-native/src/template
    
    the code of the file until where you have to start completion: use minijinja as mj;
use std::error::Error;

use neon::prelude::*;

pub(crate) trait NeonMiniJinjaContext<'a>: Context<'a> {
    fn throw_from_mj_error<T>(&mut self, err: mj::Error) -> NeonResult<T> {
        let codeblock = if let Some(source) = err.template_source() {
            let lines: Vec<_> = source.lines().enumerate().collect();
            let idx = err.line().unwrap_or(1).saturating_sub(1);
            let skip = idx.saturating_sub(3);

            let pre = lines.iter().skip(skip).take(3.min(idx)).collect::<Vec<_>>();
            let post = lines.iter().skip(idx + 1).take(3).collect::<Vec<_>>();

            let mut content = "".to_string();

            for (idx, line) in pre {
                content += &format!("{:>4} | {}\r\n", idx + 1, line);
            }

            content += &format!("{:>4} > {}\r\n", idx + 1, lines[idx].1);

            if let Some(_span) = err.range() {
                // TODO(ovr): improve
                content += &format!(
                    "     i {}{} {}\r\n",
                    " ".repeat(0),
                    "^".repeat(24),
                    err.kind(),
                );
            } else {
                content += &format!("     | {}\r\n", "^".repeat(24));
            }

            for (idx, line) in post {
                content += &format!("{:>4} | {}\r\n", idx + 1, line);
            }

            let header = if let Some(ref filename) = err.name() {
                format!("{:-^79}", format!(" {} ", filename))
            } else {
                "-".repeat(79)
            };

            format!("\r\n{}\r\n{}{}", header, content, "-".repeat(79))
        } else if let Some(ref filename) = err.name() {
            format!(" in {}:{}", filename, err.line().unwrap_or(0))
        } else {
            "".to_string()
        };

        let formatted_err = if let Some(ref detail) = err.detail() {
            format!("{}: {}", err.kind(), detail)
        } else {
            format!("{}", err.kind())
        };


    
    fn throw_from_mj_error<T>(&mut self, err: mj::Error) -> NeonResult<T> {
        let codeblock = if let Some(source) = err.template_source() {
            let lines: Vec<_> = source.lines().enumerate().collect();
            let idx = err.line().unwrap_or(1).saturating_sub(1);
            let skip = idx.saturating_sub(3);

            let pre = lines.iter().skip(skip).take(3.min(idx)).collect::<Vec<_>>();
            let post = lines.iter().skip(idx + 1).take(3).collect::<Vec<_>>();

            let mut content = "".to_string();

            for (idx, line) in pre {
                content += &format!("{:>4} | {}\r\n", idx + 1, line);
            }

            content += &format!("{:>4} > {}\r\n", idx + 1, lines[idx].1);

            if let Some(_span) = err.range() {
                // TODO(ovr): improve
                content += &format!(
                    "     i {}{} {}\r\n",
                    " ".repeat(0),
                    "^".repeat(24),
                    err.kind(),
                );
            } else {
                content += &format!("     | {}\r\n", "^".repeat(24));
            }

            for (idx, line) in post {
                content += &format!("{:>4} | {}\r\n", idx + 1, line);
            }

            let header = if let Some(ref filename) = err.name() {
                format!("{:-^79}", format!(" {} ", filename))
            } else {
                "-".repeat(79)
            };

            format!("\r\n{}\r\n{}{}", header, content, "-".repeat(79))
        } else if let Some(ref filename) = err.name() {
            format!(" in {}:{}", filename, err.line().unwrap_or(0))
        } else {
            "".to_string()
        };

        let formatted_err = if let Some(ref detail) = err.detail() {
            format!("{}: {}", err.kind(), detail)
        } else {
            format!("{}", err.kind())
        };

        if let Some(next_err) = err.source() {
            self.throw_error(format!(
                "{} caused by: {:#}{}",
                formatted_err, next_err, codeblock
            ))
        } else {
            self.throw_error(format!("{}{}", formatted_err, codeblock))
        }
    }