public void append(String value) {
            setAppend();
            validateArrayElement(getArrayDef(name), value, elements.size());
            ConfigPayloadBuilder p = new ConfigPayloadBuilder(getArrayDef(name), value);
            elements.put(elements.size(), p);
        }
Append a value to this array.

@param value Value to append.
config/src/main/java/com/yahoo/vespa/config/ConfigPayloadBuilder.java