public java.lang.String getInputKey() {
        java.lang.Object ref = inputKey_;
        if (!(ref instanceof java.lang.String)) {
          com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
          java.lang.String s = bs.toStringUtf8();
          inputKey_ = s;
          return s;
        } else {
          return (java.lang.String) ref;
        }
      }
<pre>
The
[InputAttachment.key][google.cloud.video.livestream.v1.InputAttachment.key]
of the input to switch to.
</pre>

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

@return The inputKey.
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/Event.java