如何向使用typescript AST api生成的typescript添加JSDoc注释？

import * as ts from 'typescript';

const sourceCode = `
  const num: number = 42;
  console.log(num);
`;
const sourceFile = ts.createSourceFile('example.ts', sourceCode, ts.ScriptTarget.Latest);

function visitNode(node: ts.Node) {
  if (ts.isVariableDeclaration(node)) {
    // 在这里添加JSDoc注释
    const jsDocComment = ts.addSyntheticLeadingComment(
      node,
      ts.SyntaxKind.MultiLineCommentTrivia,
      '* This is a number variable',
      false
    );
    return ts.visitEachChild(node, visitNode, context);
  }
  return ts.visitEachChild(node, visitNode, context);
}

const updatedSourceFile = ts.visitNode(sourceFile, visitNode);

const printer = ts.createPrinter();
const result = printer.printFile(updatedSourceFile);
console.log(result);