How to use the @nteract/commutable.createImmutableOutput function in @nteract/commutable

if (output) {
      // We already have something here, don't change the other fields
      return output.merge({
        data: createFrozenMediaBundle(content.data),
        metadata: fromJS(content.metadata || {})
      });
    } else if (content.output_type === "update_display_data") {
      // Nothing here and we have no valid output, just create a basic output
      return {
        data: createFrozenMediaBundle(content.data),
        metadata: fromJS(content.metadata || {}),
        output_type: "display_data"
      };
    } else {
      // Nothing here, but we have a valid output
      return createImmutableOutput(content);
    }
  };

if (!last || !last.output_type) {
    return outputs.push(createImmutableOutput(output));
  }

  if (output.output_type !== "stream" || last.output_type !== "stream") {
    // If the last output type or the incoming output type isn't a stream
    // we just add it to the outputs
    // This is kind of like a "break" between streams if we get error,
    // display_data, execute_result, etc.
    return outputs.push(createImmutableOutput(output));
  }

  const streamOutput: OnDiskStreamOutput = output;

  if (typeof streamOutput.name === "undefined") {
    return outputs.push(createImmutableOutput(streamOutput));
  }

  function appendText(text: string): string {
    if (typeof streamOutput.text === "string") {
      return escapeCarriageReturnSafe(text + streamOutput.text);
    }
    return text;
  }

  // Invariant: size > 0, outputs.last() exists
  if (last.name === streamOutput.name) {
    return outputs.updateIn([outputs.size - 1, "text"], appendText);
  }

  // Check if there's a separate stream to merge with
  const nextToLast = outputs.butLast().last(null);

export function reduceOutputs(
  outputs: List = List(),
  output: OnDiskOutput
): List {
  // Find the last output to see if it's a stream type
  // If we don't find one, default to null
  const last = outputs.last(null);

  if (!last || !last.output_type) {
    return outputs.push(createImmutableOutput(output));
  }

  if (output.output_type !== "stream" || last.output_type !== "stream") {
    // If the last output type or the incoming output type isn't a stream
    // we just add it to the outputs
    // This is kind of like a "break" between streams if we get error,
    // display_data, execute_result, etc.
    return outputs.push(createImmutableOutput(output));
  }

  const streamOutput: OnDiskStreamOutput = output;

  if (typeof streamOutput.name === "undefined") {
    return outputs.push(createImmutableOutput(streamOutput));
  }

if (last.name === streamOutput.name) {
    return outputs.updateIn([outputs.size - 1, "text"], appendText);
  }

  // Check if there's a separate stream to merge with
  const nextToLast = outputs.butLast().last(null);

  if (
    nextToLast &&
    nextToLast.output_type === "stream" &&
    nextToLast.name === streamOutput.name
  ) {
    return outputs.updateIn([outputs.size - 2, "text"], appendText);
  }
  // If nothing else matched, just append it
  return outputs.push(createImmutableOutput(streamOutput));
}

output: OnDiskOutput
): List {
  // Find the last output to see if it's a stream type
  // If we don't find one, default to null
  const last = outputs.last(null);

  if (!last || !last.output_type) {
    return outputs.push(createImmutableOutput(output));
  }

  if (output.output_type !== "stream" || last.output_type !== "stream") {
    // If the last output type or the incoming output type isn't a stream
    // we just add it to the outputs
    // This is kind of like a "break" between streams if we get error,
    // display_data, execute_result, etc.
    return outputs.push(createImmutableOutput(output));
  }

  const streamOutput: OnDiskStreamOutput = output;

  if (typeof streamOutput.name === "undefined") {
    return outputs.push(createImmutableOutput(streamOutput));
  }

  function appendText(text: string): string {
    if (typeof streamOutput.text === "string") {
      return escapeCarriageReturnSafe(text + streamOutput.text);
    }
    return text;
  }

  // Invariant: size > 0, outputs.last() exists