namespace Microsoft.FSharp.Linq
{
    [Class]
    [CompilationMapping(SourceConstructFlags.ObjectType)]
    public class QueryBuilder
    {
        [CustomOperation("groupJoin", IsLikeGroupJoin = true, JoinConditionWord = "on")]
        public QuerySource<TResult, Q> GroupJoin<TOuter, Q, TInner, TKey, TResult>(QuerySource<TOuter, Q> outerSource, QuerySource<TInner, Q> innerSource, FSharpFunc<TOuter, TKey> outerKeySelector, FSharpFunc<TInner, TKey> innerKeySelector, FSharpFunc<TOuter, FSharpFunc<IEnumerable<TInner>, TResult>> resultSelector);
    }
}