web/src/main/java/org/apache/commons/chain2/web/portlet/PortletSessionScopeMap.java [139:160]:
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        return previous;
    }

    public void putAll(Map<? extends String, ? extends Object> map) {
        for (Entry<? extends String, ? extends Object> entry : map.entrySet()) {
            put(key(entry.getKey()), entry.getValue());
        }
    }

    public Object remove(Object key) {
        if (sessionExists()) {
            String skey = key(key);
            Object previous = session.getAttribute(skey);
            session.removeAttribute(skey);
            return previous;
        }
        return null;
    }

    public int size() {
        int n = 0;
        if (sessionExists()) {
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web/src/main/java/org/apache/commons/chain2/web/servlet/ServletSessionScopeMap.java [138:159]:
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        return previous;
    }

    public void putAll(Map<? extends String, ? extends Object> map) {
        for (Entry<? extends String, ? extends Object> entry : map.entrySet()) {
            put(key(entry.getKey()), entry.getValue());
        }
    }

    public Object remove(Object key) {
        if (sessionExists()) {
            String skey = key(key);
            Object previous = session.getAttribute(skey);
            session.removeAttribute(skey);
            return previous;
        }
        return null;
    }

    public int size() {
        int n = 0;
        if (sessionExists()) {
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