fn create_valid_registry() -> Registry {
        let mut registry = Registry::new();
        try_mutate(&mut registry, &invariant_compliant_mutation());
        registry
    }
/// This helper function creates a valid registry.
This helper function creates a valid registry.
This helper function creates a valid registry .
fn create_valid_registry() -> Registry {
        let mut registry = Registry::new();
        try_mutate(&mut registry, &invariant_compliant_mutation());
        registry
    }
fn create_valid_registry ( ) -> Registry { let mut registry = Registry :: new ( ) ; try_mutate ( & mut registry , & invariant_compliant_mutation ( ) ) ; registry }
This helper function creates a valid registry.
This helper function creates a valid registry .