#pragma warning disable IDE0079 // Remove unnecessary suppression.
#pragma warning disable CA1062 // Omitted null checks. (Similar to expression tree visitor implementation pattern.)
/// <summary>
/// Accepts the query expression tree node in the specified visitor.
/// </summary>
/// <typeparam name="TQueryTree">Target type for query expressions.</typeparam>
/// <typeparam name="TMonadMember">Target type for monad member query expressions. This type has to derive from TQueryTree.</typeparam>
/// <typeparam name="TQueryOperator">Target type for query operator query expressions. This type has to derive from TMonadMember.</typeparam>
/// <param name="visitor">Visitor to process the current query expression tree node.</param>
/// <returns>Result of visiting the node.</returns>
protected internal override TQueryTree Accept <TQueryTree, TMonadMember, TQueryOperator>(QueryVisitor <TQueryTree, TMonadMember, TQueryOperator> visitor)
{
return(visitor.VisitFirst(this));
}