Sample code is not working

[99ACA]

I am trying to work with the current package without success.
I ran the sample code and I don't get the expect result.
Could you assist me please.

import { getFromContainer, IsOptional, IsString, MaxLength, MetadataStorage } from 'class-validator'
import { validationMetadatasToSchemas } from 'class-validator-jsonschema'

class BlogPost {
@IsString() id: string

@IsOptional()
@maxlength(20, { each: true })
tags: string[]
}

const metadatas = (getFromContainer(MetadataStorage) as any).validationMetadatas
const schemas = validationMetadatasToSchemas(metadatas)
console.log(schemas)

tsconfig.json
{
"compilerOptions": {
"target": "esnext",
"module": "commonjs",
"experimentalDecorators": true,
"emitDecoratorMetadata": true,
"outDir": "./dist",
"rootDir": "./src",
"sourceMap": true,
"noImplicitAny": true
},
"include": [
"src/**/*.ts",
"package.json"
],
"exclude": [
"node_modules"
]
}

{
"name": "openapi3x1",
"version": "1.0.0",
"description": "",
"main": "server.js",
"scripts": {
"test": "echo "Error: no test specified" && exit 1",
"start": "node ./dist/server.js"
},
"author": "zoro",
"license": "ISC",
"dependencies": {
"body-parser": "^1.19.0",
"class-validator-jsonschema": "^1.3.0",
"config": "^3.1.0",
"express": "^4.17.1",
"lodash": "^4.17.11",
"routing-controllers-openapi": "^1.7.0"
},
"devDependencies": {
"@types/body-parser": "^1.17.0",
"@types/config": "0.0.34",
"@types/express": "^4.17.0",
"@types/lodash": "^4.14.135",
"@types/node": "^12.0.12"
}
}

[99ACA]

sorry, missing result