private void decodeAll() {
        if (encodedValues == null) return;
        encodedValues.traverse((String name, Inspector value) -> {
            if ( ! values.containsKey(name))
                values.put(name, decodeTensor(value));
        });
    }
Returns the fields of this as an inspector, where tensors are represented as binary data
which can be decoded using
<code>com.yahoo.tensor.serialization.TypedBinaryFormat.decode(Optional.empty(), GrowableByteBuffer.wrap(featureValue.asData()))</code>
container-search/src/main/java/com/yahoo/search/result/FeatureData.java