@CanIgnoreReturnValue
    public Builder setHttpTransport(HttpTransport httpTransport) {
      this.httpTransport = httpTransport;
      return this;
    }
Sets the HTTP transport.

<p>You generally should not need to set a custom transport as the default transport {@link
KeysDownloader#DEFAULT_HTTP_TRANSPORT} should be suited for most use cases.
java_src/src/main/java/com/google/crypto/tink/util/KeysDownloader.java