code: protected final Schema handle(int version, Method meth, Properties parms) throws Exception {
      if( !(min_ver() <= version && version <= max_ver()) ) // Version check!
        return new HTTP500V1(new IllegalArgumentException("Version "+version+" is not in range V"+min_ver()+"-V"+max_ver()));
  
      // Make a version-specific Schema; primitive-parse the URL into the Schema,
      // fill the Handler from the versioned Schema.
      S s = schema(version).fillFrom(parms).fillInto((H)this); // Version-specific Schema
  
  
      // Run the Handler in the Nano Thread (nano does not grok CPS!)
      _t_start = System.currentTimeMillis();
      try { meth.invoke(this); }
      // Exception throws out of the invoked method turn into InvocationTargetException
      // rather uselessly.  Peel out the original exception & throw it.
      catch( InvocationTargetException ite ) {
        Throwable t = ite.getCause();
        throw (t instanceof Exception) ? (Exception)t : new RuntimeException(t);
      }
      _t_stop  = System.currentTimeMillis();
  
      // Version-specific unwind from the Handler back into the Schema
      return s.fillFrom((H)this);
    }
docs: Invoke the handler with parameters.  Can throw any exception the called handler can throw.