namespace Microsoft.CodeAnalysis.FlowAnalysis.DataFlow
{
    public abstract class DataFlowOperationVisitor<TAnalysisData, TAnalysisContext, TAnalysisResult, TAbstractAnalysisValue> : ?
        where TAnalysisData, AbstractAnalysisData
        where TAnalysisContext, AbstractDataFlowAnalysisContext<TAnalysisData, TAnalysisContext, TAnalysisResult, TAbstractAnalysisValue>
        where TAnalysisResult, IDataFlowAnalysisResult<TAbstractAnalysisValue>
    {
        public override sealed TAbstractAnalysisValue VisitSingleValueCaseClause(? operation, object argument);
    }
}