code: public SearchResult searchSheet(long sheetId, String query) throws SmartsheetException {
          Util.throwIfNull(query);
          Util.throwIfEmpty(query);
          try {
              return this.getResource("search/sheets/" + sheetId + "?query=" + URLEncoder.encode(query,
                      "utf-8"), SearchResult.class);
          } catch (UnsupportedEncodingException e) {
              throw new RuntimeException(e);
          }
      }
docs: Performs a search within a sheet.
  
  It mirrors to the following Smartsheet REST API method: GET /search/sheet/{sheetId}
  
  Exceptions:
  IllegalArgumentException : if query is null/empty string
  InvalidRequestException : if there is any problem with the REST API request
  AuthorizationException : if there is any problem with the REST API authorization(access token)
  ResourceNotFoundException : if the resource can not be found
  ServiceUnavailableException : if the REST API service is not available (possibly due to rate limiting)
  SmartsheetRestException : if there is any other REST API related error occurred during the operation
  SmartsheetException : if there is any other error occurred during the operation
  
  @param sheetId the sheet id
  @param query the query
  @return the search result (note that if there is no such resource, this method will throw
  ResourceNotFoundException rather than returning null).
  @throws UnsupportedEncodingException the unsupported encoding exception
  @throws SmartsheetException the smartsheet exception