Method add

Ports/CLDC11/src/java/util/HashSet.java:81–84

(E object)

    /// @return `true` when this `HashSet` did not already contain
    /// the object, `false` otherwise
    @Override
    public boolean add(E object) {
        return backingMap.put(object, this) == null;
    }

    /// Removes all elements from this `HashSet`, leaving it empty.
    ///