goog.require('ol.Map');
goog.require('ol.View');
goog.require('ol.format.MVT');
goog.require('ol.layer.VectorTile');
goog.require('ol.source.VectorTile');
goog.require('ol.style.Fill');
goog.require('ol.style.Stroke');
goog.require('ol.style.Style');
goog.require('ol.style.Text');