/// <summary>
        /// Finds a collection of entities with the specified query.
        /// </summary>
        /// <typeparam name="TEntity">The type of the entity.</typeparam>
        /// <param name="query">The query.</param>
        /// <returns></returns>
        public virtual async Task <IEnumerable <TEntity> > Where(Expression <Func <TEntity, bool> > query)
        {
            string  name   = query.Parameters[0].Name;
            TEntity entity = (TEntity)Activator.CreateInstance(query.Parameters[0].Type);
            Expression <Func <TEntity, bool> > newQuery = PredicateRewriter.Rewrite(query, "e");

            return(await client.Cypher
                   .Match("(e:" + entity.Label + ")")
                   .Where(newQuery)
                   .Return(e => e.As <TEntity>())
                   .ResultsAsync);
        }
        /// <summary>
        /// Gets the related.
        /// </summary>
        /// <typeparam name="TEntity2">The type of the entity2.</typeparam>
        /// <returns></returns>
        public virtual async Task <IEnumerable <TEntity2> > GetRelated <TEntity2, TRelationship>(Expression <Func <TEntity, bool> > query1, Expression <Func <TEntity2, bool> > query2, TRelationship relationship)
            where TEntity2 : Neo4jEntity, new()
            where TRelationship : Neo4jRelationship, new()
        {
            string   name1   = query1.Parameters[0].Name;
            TEntity  entity1 = (TEntity)Activator.CreateInstance(query1.Parameters[0].Type);
            string   name2   = query2.Parameters[0].Name;
            TEntity2 entity2 = (TEntity2)Activator.CreateInstance(query2.Parameters[0].Type);

            Expression <Func <TEntity2, bool> > newQuery = PredicateRewriter.Rewrite(query2, "e");

            return(await client.Cypher
                   .Match("(" + name1 + ":" + entity1.Label + ")-[:" + relationship.Name + "]->(" + name2 + ":" + entity2.Label + ")")
                   .Where(query1)
                   .AndWhere(query2)
                   .Return(e => e.As <TEntity2>())
                   .ResultsAsync);
        }