internal static HashSet<PrefixUnaryExpressionSyntax> Analyze(CSharpCompilation compilation, Symbol member, BoundNode node)
 {
     var walker = new UnassignedAddressTakenVariablesWalker(compilation, member, node);
     try
     {
         bool badRegion = false;
         var result = walker.Analyze(ref badRegion);
         Debug.Assert(!badRegion);
         return result;
     }
     finally
     {
         walker.Free();
     }
 }
        internal static HashSet <PrefixUnaryExpressionSyntax> Analyze(CSharpCompilation compilation, Symbol member, BoundNode node)
        {
            var walker = new UnassignedAddressTakenVariablesWalker(compilation, member, node);

            try
            {
                bool badRegion = false;
                var  result    = walker.Analyze(ref badRegion);
                Debug.Assert(!badRegion);
                return(result);
            }
            finally
            {
                walker.Free();
            }
        }