In this example on AdonisJS, the Post class definition includes @column sections. Can someone explain what this does? I assume it's creating multiple instances of the 'column' class within the Post class as member variables, each instance having a different name and data type. But how does this work and what is the @ symbol for?

  import { column, BaseModel } from '@ioc:Adonis/Lucid/Orm'

  export default class Post extends BaseModel {
    @column({ isPrimary: true })
    public id: number

    @column()
    public title: string

    @column()
    public description: string
  }

Would the following be equivalent (without the defined data types)?

export default class Post extends BaseModel
{
   constructor()
   {
      this.id = new column({ isPrimary: true });
      this.title = new column();
      this description = new column();
   }
}

UPDATE:

After realizing AdonisJS is written in TypeScript, I found this, which answers the question.