public Builder setInputKeyBytes(com.google.protobuf.ByteString value) {
        if (value == null) {
          throw new NullPointerException();
        }
        checkByteStringIsUtf8(value);
        inputKey_ = value;
        bitField0_ |= 0x00000001;
        onChanged();
        return this;
      }
<pre>
The
[InputAttachment.key][google.cloud.video.livestream.v1.InputAttachment.key]
of the input to switch to.
</pre>

<code>string input_key = 1;</code>

@param value The bytes for inputKey to set.
@return This builder for chaining.
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/Event.java