fJavaPreview= new CompilationUnitPreview(fWorkingValues, parent); return fJavaPreview;
fPreview= new SnippetPreview(fWorkingValues, parent); return fPreview;
    protected JavaPreview doCreateJavaPreview(Composite parent) {        fJavaPreview= new CompilationUnitPreview(fWorkingValues, parent);        return fJavaPreview;    }