implement toString method

converter-CellDesigner/src/main/java/lcsb/mapviewer/converter/model/celldesigner/structure/fields/LineProperties.java

 package lcsb.mapviewer.converter.model.celldesigner.structure.fields;
 
-import java.awt.*;
+import java.awt.Color;
 
+import lcsb.mapviewer.common.geometry.ColorParser;
 import lcsb.mapviewer.model.graphics.PolylineData;
 
 /**
@@ -99,4 +100,9 @@ public class LineProperties {
     this.type = type;
   }
 
+  @Override
+  public String toString() {
+    return "[" + this.getClass().getSimpleName() + " w=" + width + "; c=" + new ColorParser().colorToHtml(color) + "]";
+  }
+
 }