*  New: Constant string `okhttp3.VERSION`. This is a string like "4.5.0-RC1", "4.5.0", or
    "4.6.0-SNAPSHOT" indicating the version of OkHttp in the current runtime. Use this to include
    the OkHttp version in custom `User-Agent` headers.

 *  Fix: Don't crash when running as a plugin in Android Studio Canary 4.1. To enable
    platform-specific TLS features OkHttp must detect whether it's running in a JVM or in Android.

    val request =
      Request.Builder()
        .url(server.url("/"))
        .method("CUSTOM", "def".toRequestBody("text/plain".toMediaType()))
        .build()
    executeSynchronously(request)
      .assertCode(200)
      .assertBody("abc")
    val recordedRequest = server.takeRequest()
    assertThat(recordedRequest.method).isEqualTo("CUSTOM")
    assertThat(recordedRequest.body.readUtf8()).isEqualTo("def")

 *
 * ```java
 * // The singleton HTTP client.
 * public final OkHttpClient client = new OkHttpClient();
 * ```
 *
 * Or use `new OkHttpClient.Builder()` to create a shared instance with custom settings:
 *
 * ```java
 * // The singleton HTTP client.
 * public final OkHttpClient client = new OkHttpClient.Builder()
 *     .addInterceptor(new HttpLoggingInterceptor())
 *     .cache(new Cache(cacheDir, cacheSize))