protonj2-client/src/main/java/org/apache/qpid/protonj2/client/impl/ClientConversionSupport.java [115:141]:
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        final Set<Symbol> result;

        if (stringsSet != null) {
            result = new LinkedHashSet<>(stringsSet.size());
            stringsSet.forEach((entry) -> {
                result.add(Symbol.valueOf(entry));
            });
        } else {
            result = null;
        }

        return result;
    }

    public static Set<String> toStringSet(Symbol[] symbols) {
        Set<String> result;

        if (symbols != null) {
            result = new LinkedHashSet<>(symbols.length);
            for (Symbol symbol : symbols) {
                result.add(symbol.toString());
            }
        } else {
            result = null;
        }

        return result;
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protonj2/src/main/java/org/apache/qpid/protonj2/engine/util/StringUtils.java [162:196]:
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        final Set<Symbol> result;

        if (stringsSet != null) {
            result = new LinkedHashSet<>(stringsSet.size());
            stringsSet.forEach((entry) -> {
                result.add(Symbol.valueOf(entry));
            });
        } else {
            result = null;
        }

        return result;
    }

    /**
     * Converts the given Symbol array into a matching String {@link Set}.
     *
     * @param symbols
     * 		The given Symbol array to convert.
     *
     * @return a new String {@link Set} that contains String versions of the input Symbols.
     */
    public static Set<String> toStringSet(Symbol[] symbols) {
        Set<String> result;

        if (symbols != null) {
            result = new LinkedHashSet<>(symbols.length);
            for (Symbol symbol : symbols) {
                result.add(symbol.toString());
            }
        } else {
            result = null;
        }

        return result;
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