The /EmbeddedFiles name-tree key the file was registered under.
The filespec display filename (/UF preferred, else /F).
The embedded stream's /Subtype MIME (e.g. application/pdf), or null.
The filespec /Desc human description, or null.
The /Params /CreationDate PDF date string, or null.
The /Params /ModDate PDF date string, or null.
The decoded (filters applied) file bytes.
One embedded file attachment read back by GigaPdfDoc.attachments.
datais the decoded file bytes;mime/description/dates arenullwhen the PDF didn't record them.