/// <summary>Loads data from file with optional automated graph generation.</summary>
        /// <param name="store">Target store to be loaded with data.</param>
        /// <param name="file">Source file with data.</param>
        /// <param name="metaGraphUri">When provided, store will have automatically created graphs for all resources that are mentioned in the meta graph provided.</param>
        public static void LoadFromFile(this ITripleStore store, string file, Uri metaGraphUri)
        {
            ITripleStore targetStore = (metaGraphUri != null ? new TripleStore() : store);

            targetStore.LoadFromFile(file);
            if (metaGraphUri != null)
            {
                store.ExpandGraphs((TripleStore)targetStore, metaGraphUri);
            }
        }