@java.lang.Override
    public Builder clear() {
      super.clear();
      bitField0_ = 0;
      gcsImageUri_ = "";
      imageUri_ = "";
      return this;
    }
<pre>
External image source (Google Cloud Storage or web URL image location).
</pre>

Protobuf type {@code google.cloud.vision.v1p2beta1.ImageSource}
java-vision/proto-google-cloud-vision-v1p2beta1/src/main/java/com/google/cloud/vision/v1p2beta1/ImageSource.java