code: public IComplexOption getComplexOption(String key)
  	{
  		Object object = this.options.get(key);
  		if (object instanceof IComplexOption)
  			return (IComplexOption) object;
  		return null;
  	}
docs: <p>
  Returns the given option value.
  </p>
  
  @param key
  the option name.
  @return the complex option