Method system

src/test/java/com/amazon/ion/IonTestCase.java:282–289

@return the singleton IonSystem, stream-copy optimized depending on the injected #myStreamCopyOptimized.

()

     *          {@link #myStreamCopyOptimized}.
     */
    protected _Private_IonSystem system()
    {
        if (mySystem == null)
        {
            mySystem = newSystem(myCatalog);
        }
        return mySystem;
    }

    /**
     * Returns a new IonSystem for each call, using the passed in IonCatalog