I use transpileModule to insert a field into Page-data, but I get result is a js text, miss interface Account and opt: string | any. How can I do to get ts text?

    const ts = require('typescript')
    const factory = ts.factory
    
    const content = `
    interface Account {
      id: number
      displayName: string
      version: 1
    }
    
    Page({
      data: {
        name: 'miser',
      },
    })
    
    Component({
      data: {
        age: 18,
      },
    })
    
    function Component(opt: string | any) {}
    
    function Page(opt: any) {}
    `
    
    const result = ts.transpileModule(content, {
      compilerOptions: {},
      transformers: {
        before: [visitNodes],
      },
    })
    
    function visitNodes(ctx) {
      const visitor = node => {
        if (
          ts.isPropertyAssignment(node) &&
          node.name.escapedText === 'data' &&
          node.parent.parent.expression.escapedText === 'Page'
        ) {
          const newNode = factory.createPropertyAssignment('haha', factory.createStringLiteral('ok'))
          node.initializer.properties.push(newNode)
        }
    
        return ts.visitEachChild(node, visitor, ctx)
      }
      return sourceFile => ts.visitNode(sourceFile, visitor)
    }
    
    console.log(result.outputText)
    
    // Page({
    //   data: {
    //       name: 'miser',
    //       haha: "ok",
    //   },
    // });
    // Component({
    //   data: {
    //       age: 18,
    //   },
    // });
    // function Component(opt) { }
    // function Page(opt) { }