<BUG>public StringIdItem intern(StringIdItem string) {</BUG><CONTEXT>return intern(new StringIdItem(new CstString(string)));}public StringIdItem intern(CstString string) {return intern(new StringIdItem(string));}<extra_id_0>if (string == null) {throw new NullPointerException("string == null");}</CONTEXT>
public synchronized StringIdItem intern(StringIdItem string) {