Every now and then I encounter a code like this:

var mapboxDrawStylesCustom = [
    {
      'id': 'custom-point-inactive',
      'type': 'circle',
      'filter': ['all',
        ['==', 'active', 'false'],
        ['==', '$type', 'Point'],
        ['==', 'meta', 'feature'],
        ['!=', 'mode', 'static']
      ],
      'paint': paintPropertyPoint
    }
]

I wonder about '$type' accessor here. Like obviously it allows to grab the type of geometry. But I haven't seen it mentioned anywhere in the docs. I personally need to access latitude/longitude of the Point geometry. According to documentation it is not something that Mapbox supports. However is it maybe possible somehow using this kind of dollar-sign syntax?