code: @Override
      public boolean supportsNativeRotation() {
          return this.params.useNativeAngle &&
                  (this.params.serverType == WmsLayerParam.ServerType.MAPSERVER ||
                          this.params.serverType == WmsLayerParam.ServerType.GEOSERVER);
      }
docs: If supported by the WMS server, a parameter "angle" can be set on "customParams" or "mergeableParams".
  In this case the rotation will be done natively by the WMS.