code: public Options putDouble(String key, IModel<Double> value)
  	{
  		putOption(key, new DoubleOption(value));
  		return this;
  	}
docs: <p>
  Puts an IModel &lt;Double&gt; value for the given option name.
  </p>
  
  @param key
  the option name.
  @param value
  the float value.