val response = client.execute(request, LoggingCallback).get()

      println("Protocol ${response.version}")
      println("Response ${response.code}")
      println("${response.body.bodyText.substring(0, 20)}...")

      Assert.assertEquals(ProtocolVersion("HTTP", 2, 0), response.version)
    }
  }
}

object LoggingCallback : FutureCallback<SimpleHttpResponse> {

@Experimental
public interface VersionRange {
    /**
     * Determines whether the specified version is contained within this range.
     *
     * @param version the version to test, must not be {@code null}
     * @return {@code true} if this range contains the specified version, {@code false} otherwise
     */
    boolean contains(@Nonnull Version version);

    /**
     * Returns the upper boundary of this range, or {@code null} if none.

//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of

          # @bot-gradle test ReadyForNightly
          # ```
          # stopGradleDaemons=true
          # ```
          EOF
          # Append everything from "version:" onwards
          sed -n '/^version:/,$p' .teamcity/jdks.yaml >> .teamcity/jdks.yaml.tmp
          mv .teamcity/jdks.yaml.tmp .teamcity/jdks.yaml
      - name: Create Pull Request
        id: create-pull-request

Aber sie erleichtert die Arbeit mit asynchronem Code erheblich.

Die gleiche Syntax (oder fast identisch) wurde kürzlich auch in moderne Versionen von JavaScript (im Browser und in NodeJS) aufgenommen.

Davor war der Umgang mit asynchronem Code jedoch deutlich komplexer und schwieriger.

    /** The creator of the key match. */
    public String createdBy;

    /** The created time of the key match. */
    public String createdTime;

    /** The version number of the key match. */
    public String versionNo;

    /**
     * Clears the pager fields.
     */
    public void clear() {
        allRecordCount = 0;
        allPageCount = 0;
        existPrePage = false;

    /**
     * The created by.
     */
    public String createdBy;

    /**
     * The created time.
     */
    public String createdTime;

    /**
     * The version number.
     */
    public String versionNo;

    /**
     * Clear the pager.
     */
    public void clear() {
        allRecordCount = 0;
        allPageCount = 0;
        existPrePage = false;

    /** The sort order. */
    public String sortOrder;

    /** The creator. */
    public String createdBy;

    /** The creation time. */
    public String createdTime;

    /** The version number. */
    public String versionNo;

    /**
     * Clears all fields.
     */
    public void clear() {
        allRecordCount = 0;
        allPageCount = 0;
        existPrePage = false;
        existNextPage = false;

    /**
     * ID of the role.
     */
    public String id;

    /**
     * Name of the role.
     */
    public String name;

    /**
     * Version number of the role.
     */
    public String versionNo;

    /**
     * Clears the pager's state.
     */
    public void clear() {
        allRecordCount = 0;
        allPageCount = 0;
        existPrePage = false;

//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of