format and inserts
it at iter.gtkTextBufferDeserialize(object, content.buffer, format, iter, data, .errwarn = TRUE)objectGtkTextBuffer format is registered withcontent.bufferGtkTextBuffer to deserialize intoformatiterdataTRUE on success, FALSE otherwise.errorGErrorformats to be used must be registered using
gtkTextBufferRegisterDeserializeFormat or
gtkTextBufferRegisterDeserializeTagset beforehand.
Since 2.10