public String toRst() {
        StringBuilder b = new StringBuilder();
        for (ConfigKey key : sortedConfigs()) {
            if (key.internalConfig) {
                continue;
            }
            getConfigKeyRst(key, b);
            b.append("\n");
        }
        return b.toString();
    }
Get the configs formatted with reStructuredText, suitable for embedding in Sphinx
documentation.
clients/src/main/java/org/apache/kafka/common/config/ConfigDef.java