public String getValue(String propertyName) {
        Property property = super.get(propertyName);
        if (property == null) {
            return null;
        }
        return property.getValue();
    }
public String getValue ( String propertyName ) { Property property = super . get ( propertyName ) ; if ( property == null ) { return null ; } return property . getValue ( ) ; }
Retrieves the value of a property.
@param propertyName Name of the property (or key) in the configuration.

@return the value of the specified property, or null if not found.