code: @Override
     public void writeClassBody(Definition def, Writer out) throws IOException
     {
  
        out.write("public interface " + getClassName(def) + " extends Serializable, Referenceable");
        writeLeftCurlyBracket(out, 0);
        int indent = 1;
  
        writeConnection(def, out, indent);
        writeRightCurlyBracket(out, 0);
     }
docs: Output class code
  
  @param def definition
  @param out Writer
  @throws IOException ioException