public Builder clearOperator() {
      operator_ = getDefaultInstance().getOperator();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
<pre>
Required. The canonical Name of the operator. e.g. OccupancyCounting.
</pre>

<code>string operator = 1 [(.google.api.field_behavior) = REQUIRED];</code>

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