/tiles/tiny/{z}/{x}/{y}/tile.pbf']
        },
        burwell_small: {
          type: 'vector',
          tiles: ['http://localhost:5555/tiles/small/{z}/{x}/{y}/tile.pbf']
        },
        burwell_medium: {
          type: 'vector',
          tiles: ['http://localhost:5555/tiles/medium/{z}/{x}/{y}/tile.pbf']
        },
        burwell_large: {
          type: 'vector',
          tiles: ['http://localhost:5555/tiles/large/{z}/{x}/{y}/tile.pbf']
        },
      },
      layers: [
        {
          id: '