public Builder clearOperator() {
      operator_ = getDefaultInstance().getOperator();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
<pre>
The name of this operator.

Tentatively [A-Z][a-zA-Z0-9]*, e.g., BboxCounter, PetDetector,
PetDetector1.
</pre>

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

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