How to use the quicktype-core.TypeScriptTargetLanguage function in quicktype-core

async function generate(inPath) {
  // Best description of how to use the API was found at
  //   https://blog.quicktype.io/customizing-quicktype/
  const inputData = new InputData();
  const content = fs.readFileSync(inPath, 'utf-8');
  const source = { name: 'Schema', schema: appendDeprecatedDescription(content) };

  await inputData.addSource('schema', source, () => {
    return new JSONSchemaInput(new FetchingJSONSchemaStore(inPath));
  });

  const lang = new TypeScriptTargetLanguage();

  const { lines } = await quicktype({
    lang,
    inputData,
    alphabetizeProperties: true,
    rendererOptions: {
      'just-types': 'true',
      'explicit-unions': 'true',
      'acronym-style': 'camel',
    },
  });

  return header + lines.join('\n') + footer;
}