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>
    {
        protected virtual PredicateValueKind SetValueForIsNullComparisonOperator(? leftOperand, bool equals, TAnalysisData targetAnalysisData);
    }
}