code: public void setContent(PaperContent content)
  	{
  		if (myContent != content)
  		{
  			if (null != myContent)
  			{
  				myContent.unattach();
  			}
  			myContent = content;
  		}
  		if (null != myContent)
  		{
  			myContent.attachTo(this);
  		}
  	}
docs: /*
  (non-Javadoc)
  
  @see com.sporniket.libre.ui.swing.paper.PaperContainer#setContent(com.sporniket.libre.ui.swing.paper.PaperContent)