/// <summary>
/// Creates a query that returns a specified number of contiguous elements from the start of a sequence.
/// </summary>
/// <typeparam name="TSource">The type of the elements of source.</typeparam>
/// <param name="query">The query to return elements from.</param>
/// <param name="count">The number of elements to return.</param>
/// <returns>A query that returns a sequence containing the specified number of elements from the start of the input sequence.</returns>
public static IQueryExpr <IEnumerable <TSource> > Take <TSource>(this IQueryExpr <IEnumerable <TSource> > query, int count)
{
return(new QueryExpr <IEnumerable <TSource> >(QExpr.NewTake(Expression.Constant(count), query.Expr)));
}