public static InputLocation merge(InputLocation target, InputLocation source, boolean sourceDominant) {
        if (source == null) {
            return target;
        } else if (target == null) {
            return source;
        }

        InputLocation result = new InputLocation(target.getLineNumber(), target.getColumnNumber(), target.getSource());

        java.util.Map<Object, InputLocation> locations;
        java.util.Map<Object, InputLocation> sourceLocations = source.getLocations();
        java.util.Map<Object, InputLocation> targetLocations = target.getLocations();
        if (sourceLocations == null) {
            locations = targetLocations;
        } else if (targetLocations == null) {
            locations = sourceLocations;
        } else {
            locations = new java.util.LinkedHashMap();