code: func (sh *ScriptSignificanceHeuristic) Source() (interface{}, error) {
  	source := make(map[string]interface{})
  	if sh.script != nil {
  		src, err := sh.script.Source()
  		if err != nil {
  			return nil, err
  		}
  		source["script"] = src
  	}
  	return source, nil
  }
docs: // Source returns the parameters that need to be added to the REST parameters.