public ApiClient setUserAgent(String userAgent) {
    addDefaultHeader("User-Agent", userAgent);
    return this;
  }
Set the User-Agent header's value (by adding to the default header map).
@param userAgent User agent
@return API client
plc4j/drivers/ctrlx/src/main/java/org/apache/plc4x/java/ctrlx/readwrite/rest/datalayer/ApiClient.java