OptionalincludeOptionalisOptionallayoutOptionalmodeOptionalopenOptionaloriginThe source the file was opened from, recorded in the recent-files history with the
entry. Opens that carry none — a host shell's own "Open…", a drag & drop — are still
recorded; the history then derives the device from the document's path.
OptionalpageOptionalpasswordOptionalpathHost-app file path of the document — stored on the session and passed to the device save handler.
OptionalprogressOptionalskip
When true, opens the document into the active side-by-side pane instead of creating a new tab