code: public Coordinate metersToLngLat(double mx, double my) {
          double lon = (mx / originShift) * 180.0;
          double lat = (my / originShift) * 180.0;
  
          lat = 180 / Math.PI * (2 * Math.atan(Math.exp(lat * Math.PI / 180.0)) - Math.PI / 2.0);
  
          return new Coordinate(lon, lat);
      }
docs: Converts XY point from Spherical Mercator (EPSG:3785) to lat/lon
  (EPSG:4326)
  
  @param mx the X coordinate in meters
  @param my the Y coordinate in meters
  @return The coordinate transformed to EPSG:4326