private final Source source;

        SourceWrapper(Source source) {
            this.source = source;
        }

        @Override
        public InputStream getInputStream() throws IOException {
            return source.openStream();
        }

        @Override
        public String getLocation() {
            return source.getLocation();
        }

                    return null;
                }

                @Override
                public InputStream openStream() throws IOException {
                    return modelSource.getInputStream();
                }

                @Override
                public String getLocation() {
                    return modelSource.getLocation();
                }

                @Override