// Write the mocking script.
    peer.sendFrame().settings(Settings())
    peer.acceptFrame() // ACK
    peer.sendFrame().ping(false, 2, 3)
    peer.acceptFrame() // PING
    peer.play()

    // Play it back.
    connect(peer)

    // Verify the peer received what was expected.
    val ping = peer.takeFrame()
    assertThat(ping.type).isEqualTo(Http2.TYPE_PING)
    assertThat(ping.streamId).isEqualTo(0)

    // inputs to achieve the legalization task of EnsureBiasVector. this
    // requires the filter tensor to have static shape.

    // TODO(antiagainst): also handle the case of tf.Add(tf.[op], <bias>)

    // Get a splat zero tensor with the expected dimension for the bias tensor
    auto elem_type = filter_type.getElementType();
    auto bias_dim = static_cast<const ConcreteType *>(this)->getBiasDim(
        filter_type.getShape());