code: func (fs *FilterService) Get(filterID int) (*Filter, *Response, error) {
  	apiEndpoint := fmt.Sprintf("rest/api/2/filter/%d", filterID)
  	req, err := fs.client.NewRequest("GET", apiEndpoint, nil)
  	if err != nil {
  		return nil, nil, err
  	}
  	filter := new(Filter)
  	resp, err := fs.client.Do(req, filter)
  	if err != nil {
  		jerr := NewJiraError(resp, err)
  		return nil, resp, jerr
  	}
  
  	return filter, resp, err
  }
docs: // Get retrieves a single Filter from Jira