code: function(lonlat, zoom, dragging, forceZoomChange) {
          if (this.panTween) {
              this.panTween.stop();
          }
          if (this.zoomTween) {
              this.zoomTween.stop();
          }            
          this.moveTo(lonlat, zoom, {
              'dragging': dragging,
              'forceZoomChange': forceZoomChange
          });
      }
docs: APIMethod: setCenter
  Set the map center (and optionally, the zoom level).
  
  Parameters:
  lonlat - {<OpenLayers.LonLat>|Array} The new center location.
  If provided as array, the first value is the x coordinate,
  and the 2nd value is the y coordinate.
  zoom - {Integer} Optional zoom level.
  dragging - {Boolean} Specifies whether or not to trigger
  movestart/end events
  forceZoomChange - {Boolean} Specifies whether or not to trigger zoom
  change events (needed on baseLayer change)
  
  TBD: reconsider forceZoomChange in 3.0