amp.jsx

const AmpOutputType = props => {
  ...
};

// Does not work
AmpOutputType.transform = {
  amp({ data }) {
    let newData = data;
    // magic happens here
    return {
      data: newData,
    };
  },
};

// Creates `newAmp` output type
AmpOutputType.transform = {
  newAmp({ data }) {
    let newData = data;
    // magic happens here
    return {
      data: newData,
    };
  },
};

// Does not add `amp` as a fallback to `newAmp`
AmpOutputType.fallback = ["amp", "default"];

export default AmpOutputType;