Function encode_array 

pub fn encode_array(
    array: &Box<dyn Array>,
    options: &WriteOptions,
    variadic_buffer_counts: &mut Vec<i64>,
    buffers: &mut Vec<Buffer>,
    arrow_data: &mut Vec<u8>,
    nodes: &mut Vec<FieldNode>,
    offset: &mut i64,
)

Available on crate feature io_ipc only.