added toString() methods to the TimeRangeModel and TimeRangeWithZoomModel

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/TimeRangeModel.java

@@ -57,4 +57,9 @@ public class TimeRangeModel implements TimeRangeProvider {
     public Date getToTime() {
         return toTime;
     }
+
+    @Override
+    public String toString() {
+        return "TimeRangeModel [fromTime=" + fromTime + ", toTime=" + toTime + "]";
+    }
 }

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/client/TimeRangeWithZoomModel.java

@@ -56,4 +56,10 @@ public class TimeRangeWithZoomModel extends TimeRangeModel implements TimeRangeW
     public boolean isZoomed() {
         return isTimeZoomed;
     }
+
+    @Override
+    public String toString() {
+        return "TimeRangeWithZoomModel [fromTime=" + fromTime + ", toTime=" + toTime + ", zoomStartTimepoint=" + zoomStartTimepoint + ", zoomEndTimepoint="
+                + zoomEndTimepoint + ", isTimeZoomed=" + isTimeZoomed + "]";
+    }
 }