umya-spreadsheet 3.0.0

umya-spreadsheet is a library written in pure Rust to read and write xlsx file.
Documentation 
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use std::io;

use quick_xml::{
    Writer,
    events::{
        BytesDecl,
        Event,
    },
};

use super::{
    XlsxError,
    driver::write_new_line,
};
use crate::structs::{
    Worksheet,
    WriterManager,
};

pub(crate) fn write<W: io::Seek + io::Write>(
    worksheet: &Worksheet,
    writer_mng: &mut WriterManager<W>,
) -> Result<(String, Vec<(String, String)>), XlsxError> {
    let mut rel_list: Vec<(String, String)> = Vec::new();

    if !worksheet.has_drawing_object() {
        return Ok((String::new(), rel_list));
    }

    let mut writer = Writer::new(io::Cursor::new(Vec::new()));
    // XML header
    writer
        .write_event(Event::Decl(BytesDecl::new(
            "1.0",
            Some("UTF-8"),
            Some("yes"),
        )))
        .unwrap();
    write_new_line(&mut writer);

    worksheet
        .worksheet_drawing()
        .write_to(&mut writer, worksheet.ole_objects(), &mut rel_list);

    let file_no = writer_mng.add_file_at_drawing(writer)?;
    Ok((file_no.to_string(), rel_list))
}