public Builder setInputKeys(int index, java.lang.String value) {
        if (value == null) {
          throw new NullPointerException();
        }
        ensureInputKeysIsMutable();
        inputKeys_.set(index, value);
        bitField0_ |= 0x00000001;
        onChanged();
        return this;
      }
<pre>
The
[InputAttachment.key][google.cloud.video.livestream.v1.InputAttachment.key]s
of inputs to failover to when this input is disconnected. Currently, only
up to one backup input is supported.
</pre>

<code>repeated string input_keys = 1;</code>

@param index The index to set the value at.
@param value The inputKeys 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/InputAttachment.java