/// Provides functionality for operations on String and &str.
pubmodstring;/// Provides general mathematical operators to compare types implementing Any
pubmodmath;/// Provides functionality for &Vec<T> and an array of any type
pubmodvec;/// Provides functionality for hashmaps
pubmodmap;#[cfg(test)]modtests{usesuper::*;#[test]fntest_exec(){let vector =vec![1,2,3,4];assert!(vec::is_unique(&vector));}}