public override void VisitReturnStatement(IReturnStatement returnStatementParam)
{
ICSharpExpression csharpExpression = returnStatementParam.Value;
expressionTypes.Add(csharpExpression != null
? csharpExpression.GetExpressionType(resolveContext)
: GetVoidType(returnStatementParam.GetPsiModule()));
base.VisitReturnStatement(returnStatementParam);
}