+ /**
+ * Serialise the given object and add it to the list.
+ * <p>
+ * <b>Important: </b>If the operation fails (with a
+ * {@link NotSerializableException}), the {@link Exporter} will be corrupted
+ * (will contain bad, most probably not importable data).
+ *
+ * @param o
+ * the object to serialise
+ * @return this (for easier appending of multiple values)
+ *
+ * @throws NotSerializableException
+ * if the object cannot be serialised (in this case, the
+ * {@link Exporter} can contain bad, most probably not
+ * importable data)
+ */