public Builder setOperator(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      operator_ = value;
      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>

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