private List<Pair<String, Tensor>> readSmallConstants() {
            try {
                ApplicationFile file = application.getFile(modelFiles.smallConstantsPath());
                if ( ! file.exists()) return List.of();

                List<Pair<String, Tensor>> constants = new ArrayList<>();
                BufferedReader reader = new BufferedReader(file.createReader());
                String line;
                while (null != (line = reader.readLine())) {
                    String[] parts = line.split("\t");
                    String name = parts[0];
                    TensorType type = TensorType.fromSpec(parts[1]);
                    Tensor tensor = Tensor.from(type, parts[2]);
                    constants.add(new Pair<>(name, tensor));
                }
                return constants;
            }
            catch (IOException e) {
                throw new UncheckedIOException(e);
            }
        }
Adds this constant to the application package as a file,
such that it can be distributed using file distribution.

@return the path to the stored constant, relative to the application package root
config-model/src/main/java/com/yahoo/vespa/model/ml/ConvertedModel.java