public final IonSystemBuilder withStreamCopyOptimized(boolean optimized)
    {
        IonSystemBuilder b = mutable();
        b.setStreamCopyOptimized(optimized);
        return b;
    }
public final IonSystemBuilder withStreamCopyOptimized ( boolean optimized ) { IonSystemBuilder b = mutable ( ) ; b . setStreamCopyOptimized ( optimized ) ; return b ; }
Declares whether built systems may attempt to optimize
{@link IonWriter#writeValue(IonReader)} by copying raw source data,
returning a new mutable builder if this is immutable.
<p>
<b>This feature is experimental! Please test thoroughly and report any
issues.</b>

@see #isStreamCopyOptimized()
@see #setStreamCopyOptimized(boolean)