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: belongs_to.rs
    path of file: ./repos/diesel/diesel/src/associations
    
    the code of the file until where you have to start completion: use super::HasTable;
use crate::dsl::{Eq, EqAny, Filter, FindBy};
use crate::expression::array_comparison::AsInExpression;
use crate::expression::AsExpression;
use crate::prelude::*;
use crate::query_dsl::methods::FilterDsl;
use crate::sql_types::SqlType;

use std::borrow::Borrow;
use std::hash::Hash;

/// Indicates that a type belongs to `Parent`
///
/// Specificall
    
/// # fn run_test() -> QueryResult<()> {
/// #     let connection = &mut establish_connection();
/// let users = users::table.load::<User>(connection)?;
/// let posts = Post::belonging_to(&users)
///     .load::<Post>(connection)?
///     .grouped_by(&users);
/// let data = users.into_iter().zip(posts).collect::<Vec<_>>();
///
/// let expected_data = vec![
///     (
///         User { id: 1, name: "Sean".into() },
///         vec![
///             Post { id: 1, user_id: 1, title: "My first post".into() },
///             Post { id: 2, user_id: 1, title: "About Rust".into() },
///         ],
///     ),
///     (
///         User { id: 2, name: "Tess".into() },
///         vec![
///             Post { id: 3, user_id: 2, title: "My first post too".into() },
///         ],
///     ),
/// ];
///
/// assert_eq!(expected_data, data);
/// #     Ok(())
/// # }