Function set_attachment_file 

pub fn set_attachment_file(
    edit: &mut EditDoc<'_>,
    limits: &Limits,
    index: usize,
    bytes: &[u8],
) -> Result<bool, Error>

Replaces attachment index’s embedded file with a new stream carrying /Type /EmbeddedFile, /DL <len> and /Params << /Size <len> /CheckSum <md5> >>, linked as /EF << /F <ref> >> on the file specification; a MIME type or date the old stream had is not carried over. Ok(false) when there is no such attachment.

Errors

When the document has no catalog to hold the tree.