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: chase.rs
    path of file: ./repos/rusty-razor/razor-chase/src
    
    the code of the file until where you have to start completion: //! Provides a framework and interfaces to various components that are used for implementing
//! the chase. It also implements entrypoints for running the chase.
//!
//! ## Background
//! Razor implements a variant of [the chase] algorithm to construct models for first-order
    
    fn test_element() {
        assert_eq!("e#0", e_0().to_string());
        assert_eq!(e_0(), e_0());
        assert_ne!(e_0(), e_1());
        assert!(e_0() < e_1());
        assert!(!(e_0() > e_1()));
        assert!(!(e_1() > e_1()));
        assert!(!(e_1() < e_1()));
        {
            let mut e0 = e_0();
            let e1 = e_1();
            e0.identify(&e1);
            assert_eq!(e_1(), e0);
            assert_eq!(e_1(), e1);
        }
    }