public void changeProperty(String propertyName, Object propertyValue)
            throws ShanksException {
        this.properties.put(propertyName, propertyValue);
        this.checkStatus();
    }
public void changeProperty ( String propertyName , Object propertyValue ) throws ShanksException { this . properties . put ( propertyName , propertyValue ) ; this . checkStatus ( ) ; }
If the property exists, this method changes it. If not, this method
creates it.

@param propertyName
@param propertyValue
@throws UnsupportedNetworkElementFieldException