fn main() {
    let blobs = Blobs::new(128 * 1024);
    for blob in blobs.take(10) {
        println!("{}", blob.len());
    }
}

struct Blobs {
    size: usize,
}

impl Blobs {
    fn new(size: usize) -> Self {
        Self { size }
    }
}

impl Iterator for Blobs {
    type Item = Vec<u8>;

    fn next(&mut self) -> Option<Self::Item> {
        Some(vec![0; self.size])
    }
}