public Builder setEventId(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      eventId_ = value;
      bitField0_ |= 0x00000080;
      onChanged();
      return this;
    }
<pre>
Optional. Event ID of the input/output streams.
This is useful when you have a StreamSource/StreamSink operator in the
Analysis, and you want to manually specify the Event to read from/write to.
</pre>

<code>string event_id = 8 [(.google.api.field_behavior) = OPTIONAL];</code>

@param value The eventId to set.
@return This builder for chaining.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/Process.java