public Builder clearState() {
      bitField0_ = (bitField0_ & ~0x00000010);
      state_ = 0;
      onChanged();
      return this;
    }
<pre>
Output only. State of the index.
</pre>

<code>
.google.cloud.visionai.v1.Index.State state = 4 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>

@return This builder for chaining.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/Index.java