public Builder mergeProductSet(com.google.cloud.vision.v1p4beta1.ProductSet value) {
      if (productSetBuilder_ == null) {
        if (((bitField0_ & 0x00000002) != 0)
            && productSet_ != null
            && productSet_ != com.google.cloud.vision.v1p4beta1.ProductSet.getDefaultInstance()) {
          getProductSetBuilder().mergeFrom(value);
        } else {
          productSet_ = value;
        }
      } else {
        productSetBuilder_.mergeFrom(value);
      }
      if (productSet_ != null) {
        bitField0_ |= 0x00000002;
        onChanged();
      }
      return this;
    }
<pre>
Required. The ProductSet to create.
</pre>

<code>
.google.cloud.vision.v1p4beta1.ProductSet product_set = 2 [(.google.api.field_behavior) = REQUIRED];
</code>
java-vision/proto-google-cloud-vision-v1p4beta1/src/main/java/com/google/cloud/vision/v1p4beta1/CreateProductSetRequest.java