r##"#[no_mangle]
pub extern "C" fn Foo_f(this: *mut Foo, a0: i32, a1: i32, a2: CRustStrView) -> CRustString {
    let mut a2: &str = unsafe {
        let slice: &[u8] = ::std::slice::from_raw_parts(a2.data as *const u8, a2.len);
        ::std::str::from_utf8_unchecked(slice)
    };
    let mut a2: String = String::from(a2);
    let this: &Foo = unsafe { this.as_mut().unwrap() };
    let mut ret: String = Foo::f(this, a0, a1, a2);
    let mut ret: CRustString = CRustString::from_string(ret);
    ret
}"##;