.post(ProgressRequestBody(requestBody, progressListener))
        .build()

    client.newCall(request).execute().use { response ->
      if (!response.isSuccessful) throw IOException("Unexpected code $response")
      println(response.body.string())
    }
  }

  private class ProgressRequestBody(
    private val delegate: RequestBody,
    private val progressListener: ProgressListener,
  ) : RequestBody() {

        private static class ProgressRequestBody extends RequestBody {
          private final ProgressListener progressListener;
          private final RequestBody delegate;

          public ProgressRequestBody(RequestBody delegate, ProgressListener progressListener) {
            this.delegate = delegate;
            this.progressListener = progressListener;
          }

          @Override public MediaType contentType() {

  }

  private static class ProgressRequestBody extends RequestBody {

    private final ProgressListener progressListener;
    private final RequestBody delegate;

    public ProgressRequestBody(RequestBody delegate, ProgressListener progressListener) {
      this.delegate = delegate;
      this.progressListener = progressListener;
    }

    @Override
    public MediaType contentType() {
      return delegate.contentType();

til.Map); public final java.net.PasswordAuthenticati getPasswordAuthentic(); } org/gradle/wrapper/Download.class package org.gradle.wrapper; public final class Download { public final Logger logger; public final Download$DefaultDownloadProgr progressListener; public final java.util.Map systemProperties; public final int networkTimeout; public static java.util.HashMap convertSystemPropert(java.util.Properties); public void Download(Logger, java.util.HashMap, int); public static java.net.URI safeUri(java.net.URI);...