Function gclient::ext::sp_runtime::codec::decode_vec_with_len

pub fn decode_vec_with_len<T, I>(
    input: &mut I,
    len: usize,
) -> Result<Vec<T>, Error>
where
    T: Decode,
    I: Input,

Decode the vec (without a prepended len).

This is equivalent to decode all elements one by one, but it is optimized in some situation.