How to use the @azure-tools/codegen.serialize function in @azure-tools/codegen

export async function protocolGen(host: Host) {
  const debug = await host.GetValue('debug') || false;

  try {

    // get the code model from the core
    const session = await startSession(host, codeModelSchema);
    const namespace = await session.getValue('namespace');

    const operations = await generateOperations(session);

    // output the model to the pipeline.  this must happen after all model
    // updates are complete and before any source files are written.
    host.WriteFile('code-model-v4.yaml', serialize(session.model), undefined, 'code-model-v4');

    for (const op of values(operations)) {
      host.WriteFile(`internal/${namespace}/${op.name.toLowerCase()}.go`, op.content, undefined, 'source-file-go');
    }

    const enums = await generateEnums(session);
    if (enums.length > 0) {
      host.WriteFile(`internal/${namespace}/enums.go`, enums, undefined, 'source-file-go');
    }

    const models = await generateModels(session);
    host.WriteFile(`internal/${namespace}/models.go`, models, undefined, 'source-file-go');

    const timeHelpers = await generateTimeHelpers(session);
    for (const helper of values(timeHelpers)) {
      host.WriteFile(`internal/${namespace}/${helper.name.toLowerCase()}.go`, helper.content, undefined, 'source-file-go');

export async function protocolGen(host: Host) {
  const debug = await host.GetValue('debug') || false;

  try {
    // get the code model from the core
    const session = await startSession(host, codeModelSchema);
    const operations = await generateOperations(session);
    let filePrefix = await session.getValue('file-prefix', '');
    // if a file prefix was specified, ensure it's properly snaked
    if (filePrefix.length > 0 && filePrefix[filePrefix.length - 1] !== '_') {
      filePrefix += '_';
    }

    // output the model to the pipeline.  this must happen after all model
    // updates are complete and before any source files are written.
    host.WriteFile('code-model-v4.yaml', serialize(session.model), undefined, 'code-model-v4');

    for (const op of values(operations)) {
      host.WriteFile(`${filePrefix}${op.name.toLowerCase()}.swift`, op.content, undefined, 'source-file-swift');
    }

    const enums = await generateEnums(session);
    if (enums.length > 0) {
      host.WriteFile(`${filePrefix}enums.swift`, enums, undefined, 'source-file-swift');
    }

    const models = await generateModels(session);
    host.WriteFile(`${filePrefix}models.swift`, models, undefined, 'source-file-swift');

    const client = await generateClient(session);
    host.WriteFile(`${filePrefix}client.swift`, client, undefined, 'source-file-swift');