Function segment_into 

pub fn segment_into<T: AsRef<[u8]>, E: Extend<Segment>>(
    data: T,
    max_segment_size: usize,
    frame_id: FrameId,
    segments: &mut E,
) -> Result<()>

Helper function to segment data into segments of a given max_segment_size length. All segments are tagged with the same frame_id and output into the given segments buffer.