Introduce a new FixingsFacet to add save access to the current Km Values which are accessed by a String like a map must be checked for null. The new FixingsFacet adds a getCurrentKm method that abstracts the direct access to the CallContext and always returns a valid double value.

package de.intevation.flys.jfree;

/** Interface to say something is labelled. */
public interface HasLabel {
    public String getLabel();
    public void setLabel(String label);
}
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