public Builder setValue(java.lang.String value) {
        if (value == null) {
          throw new NullPointerException();
        }
        value_ = value;
        bitField0_ |= 0x00000002;
        onChanged();
        return this;
      }
<pre>
The value of the label attached to the product. Cannot be empty and
cannot exceed 128 bytes.
</pre>

<code>string value = 2;</code>

@param value The value to set.
@return This builder for chaining.
java-vision/proto-google-cloud-vision-v1p4beta1/src/main/java/com/google/cloud/vision/v1p4beta1/Product.java