How to use the @tanker/global-this.Buffer function in @tanker/global-this

const dataTypeDefs = (() => {
  const defs = [];
  if (globalThis.ArrayBuffer !== undefined)
    defs.push({ type: ArrayBuffer, lengthOf: (arg: ArrayBuffer) => arg.byteLength });
  if (globalThis.Buffer !== undefined)
    defs.push({ type: Buffer, lengthOf: (arg: Buffer) => arg.length }); // MUST be before Uint8Array
  if (globalThis.Uint8Array !== undefined)
    defs.push({ type: Uint8Array, lengthOf: (arg: Uint8Array) => arg.length });
  if (globalThis.File !== undefined) {
    defs.push({ type: File, lengthOf: (arg: File) => arg.size }); // MUST be before FilePonyfill and Blob
    defs.push({ type: FilePonyfill, lengthOf: (arg: FilePonyfill) => arg.size }); // MUST be before Blob
  }
  if (globalThis.Blob !== undefined)
    defs.push({ type: Blob, lengthOf: (arg: Blob) => arg.size });
  return defs;
})();

export const getConstructorName = (constructor: Object): string => {
  if (constructor === ArrayBuffer)
    return 'ArrayBuffer';
  if (globalThis.Buffer && constructor === Buffer)
    return 'Buffer';
  if (constructor === Uint8Array)
    return 'Uint8Array';
  if (globalThis.File && (constructor === File || constructor === FilePonyfill)) // must be before Blob
    return 'File';
  if (globalThis.Blob && constructor === Blob)
    return 'Blob';
  throw new InternalError('Assertion error: unhandled type');
};