Map from Class that inherits Tilemap

Phaser 3
1

Hi everyone, I was hoping I might be able to get some help with creating a map class.

This is what I have so far

class Map {
    constructor (scene)
    {
        scene.map = scene.make.tilemap({ 
            key: 'map' 
        });
        let tiles = scene.map.addTilesetImage('spritesheet', 'tiles');
        scene.map.createStaticLayer('Grass', tiles, 0, 0);
        scene.obstacles = scene.map.createStaticLayer('Obstacles', tiles, 0, 0);
        scene.interactives = scene.map.createStaticLayer('Interactive', tiles, 0, 0);
    
        scene.obstacles.setCollisionByExclusion([-1]);
        scene.interactives.setCollisionByExclusion([-1]);
    
        scene.physics.world.bounds.width = scene.map.widthInPixels;
        scene.physics.world.bounds.height = scene.map.heightInPixels;
    } 
}

I would like to create this from an existing class in Phaser. I am thinking the extension I need is Phaser.Tilemaps.Tilemap, but whenever I tried to make it that way I can’t seem to get anything to work.

Example

class Map extends Phaser.Tilemaps.Tilemap
{
  constructor (scene, key)
  {
    super(scene, key);
  }
}
let map = new Map(this, {key: 'map'});

Help?