private ContentLineStrategy contentLineGenerator;
protected void setContentLineGenerator(ContentLineStrategy contentLineGenerator)
{
this.contentLineGenerator = contentLineGenerator;
}
<BUG>protected Callback<VChild, Void> copyChildCallback()
</BUG>
{
throw new RuntimeException("Can't copy children.  copyChildCallback isn't overridden in subclass." + this.getClass());
};

private ContentLineStrategy contentLineGenerator;
protected void setContentLineGenerator(ContentLineStrategy contentLineGenerator)
{
this.contentLineGenerator = contentLineGenerator;
}
protected Callback<VChild, Void> copyIntoCallback()
{
throw new RuntimeException("Can't copy children.  copyChildCallback isn't overridden in subclass." + this.getClass());
};
