Function i32_le_fmt 

pub open spec fn i32_le_fmt() -> I32LeFmt

{
    Mapped {
        inner: Fixed::<4>,
        mapper: (
            |i: Seq<u8>| i32_le_from_bytes(array_from_seq(i)),
            |o: i32| i32_le_to_bytes(o)@,
        ),
    }
}