type, which is currently "jpeg", "png", "ico" or "bmp".
If error is set, FALSE will be returned.
See gdkPixbufSave for more details.gdkPixbufSavev(object, filename, type, option.keys, option.values, .errwarn = TRUE)filenametypeoption.keysNULL-terminatedoption.valueserrorGError] return location for error, or NULL