private void AddDescriptionForMethod(IMethodSymbol method)
            {
                // TODO : show duplicated member case
                // TODO : a way to check whether it is a member call off dynamic type?
                var awaitable = method.IsAwaitable(_semanticModel, _position);
                var extension = method.IsExtensionMethod || method.MethodKind == MethodKind.ReducedExtension;

                if (awaitable && extension)
                {
                    AddAwaitableExtensionPrefix();
                }
                else if (awaitable)
                {
                    AddAwaitablePrefix();
                }
                else if (extension)
                {
                    AddExtensionPrefix();
                }

                AddToGroup(SymbolDescriptionGroups.MainDescription,
                           ToMinimalDisplayParts(method, s_memberSignatureDisplayFormat));

                if (awaitable)
                {
                    AddAwaitableUsageText(method, _semanticModel, _position);
                }
            }
        protected IList <SymbolDisplayPart> GetAwaitableUsage(IMethodSymbol method, SemanticModel semanticModel, int position)
        {
            if (method.IsAwaitable(semanticModel, position))
            {
                return(method.ToAwaitableParts(SyntaxFacts.GetText(SyntaxKind.AwaitKeyword), "x", semanticModel, position));
            }

            return(SpecializedCollections.EmptyList <SymbolDisplayPart>());
        }
        protected IList<SymbolDisplayPart> GetAwaitableUsage(IMethodSymbol method, SemanticModel semanticModel, int position)
        {
            if (method.IsAwaitable(semanticModel, position))
            {
                return method.ToAwaitableParts(SyntaxFacts.GetText(SyntaxKind.AwaitKeyword), "x", semanticModel, position);
            }

            return SpecializedCollections.EmptyList<SymbolDisplayPart>();
        }
            private void AddDescriptionForMethod(IMethodSymbol method)
            {
                // TODO : show duplicated member case
                // TODO : a way to check whether it is a member call off dynamic type?
                var awaitable = method.IsAwaitable(_semanticModel, _position);
                var extension = method.IsExtensionMethod || method.MethodKind == MethodKind.ReducedExtension;
                if (awaitable && extension)
                {
                    AddAwaitableExtensionPrefix();
                }
                else if (awaitable)
                {
                    AddAwaitablePrefix();
                }
                else if (extension)
                {
                    AddExtensionPrefix();
                }

                AddToGroup(SymbolDescriptionGroups.MainDescription,
                    ToMinimalDisplayParts(method, s_memberSignatureDisplayFormat));

                if (awaitable)
                {
                    AddAwaitableUsageText(method, _semanticModel, _position);
                }
            }