open fun onClosing(
    webSocket: WebSocket,
    code: Int,
    reason: String,
  ) {
  }

  /**
   * Invoked when both peers have indicated that no more messages will be transmitted and the
   * connection has been successfully released. No further calls to this listener will be made.
   */
  open fun onClosed(
    webSocket: WebSocket,
    code: Int,
    reason: String,
  ) {
  }

  /**

    of Modifications made by that Contributor either alone and/or in
    combination with its Contributor Version (or portions of such
    combination), to make, use, sell, offer for sale, have made, and/or
    otherwise dispose of: (1) Modifications made by that Contributor (or
    portions thereof); and (2) the combination of Modifications made by

 * local IP addresses. Requests made to `127.0.0.1` will reach the IPv4 server, and requests made to
 * `::1` will reach the IPv6 server.
 *
 * By orchestrating two different servers with the same port but different IP addresses, we can
 * test what OkHttp does when both are reachable, or if only one is reachable.
 *
 * This test only runs on host machines that have both IPv4 and IPv6 addresses for localhost.
 */
@Timeout(30)

refRect.right < bound.left\n  ) {\n    // Avoid unnecessary DOM access if visibility hasn't changed\n    if (data.hide === true) {\n      return data;\n    }\n\n    data.hide = true;\n    data.attributes['x-out-of-boundaries'] = '';\n  } else {\n    // Avoid unnecessary DOM access if visibility hasn't changed\n    if (data.hide === false) {\n      return data;\n    }\n\n    data.hide = false;\n    data.attributes['x-out-of-boundaries'] = false;\n  }\n\n  return data;\n}\n","import setStyles from...

Blocking APIs may be inefficient because you hold a thread idle while waiting on the network. Threads are expensive because they have both a memory overhead and a context-switching overhead.

#### Framed protocols

    val in2 = response2.body.source()
    assertThat(in2.readUtf8("I love puppies but hate spiders".length.toLong()))
      .isEqualTo(
        "I love puppies but hate spiders",
      )
    assertThat(response2.code).isEqualTo(200)
    assertThat(response2.message).isEqualTo("Fantastic")
    assertThat(in2.exhausted()).isTrue()
    in2.close()
    assertThat(cache.writeSuccessCount()).isEqualTo(1)

 * }
 *
 * @author Louis Wasserman
 * @since 15.0
 * @deprecated Use {@link com.google.common.graph.Traverser} instead. All instance methods have
 *     their equivalent on the result of {@code Traverser.forTree(tree)} where {@code tree}
 *     implements {@code SuccessorsFunction}, which has a similar API as {@link #children} or can be

   * someone still manages to pass null, let's continue to have the method work.
   *
   * (PatternFilenameFilter is of course one of those classes that shouldn't be a publicly visible
   * class to begin with but rather something returned from a static factory method whose declared
   * return type is plain FilenameFilter. If we made such a change, then the annotation we choose

,g,h){var i=h.disabledFormFilter?g.filter(h.disabledFormFilter):g,j=h.showErrorDialogs===c||h.showErrorDialogs,k=function(b,c,d){var e=a(this);d&&d.indexOf("blur")>-1?e.unbind("afterValidation",k):c.isValid?e.unbind("afterValidation",k):e.valAttr("have-been-blurred")||(c.shouldChangeDisplay=!1)};i.addClass(j?"disabled-with-errors":"disabled-without-errors").on("reset",function(){e(a(this),"disabled")}).find("*[data-validation]").valAttr("event","keyup change").on("validation",function(b,c){if(!f){f=!0;var...

then fixing the bug will break that code.
New features can also have similar impacts:
enabling the HTTP/2 use by the HTTP client broke programs
connecting to servers with buggy HTTP/2 implementations.
These kinds of changes are unavoidable and
[permitted by the Go 1 compatibility rules](/doc/go1compat).
Even so, Go provides a mechanism called GODEBUG to
reduce the impact such changes have on Go developers
using newer toolchains to compile old code.