private IEnumerable<ITypeSymbol> InferTypeInMemberAccessExpression(MemberAccessExpressionSyntax expression) { var awaitExpression = expression.GetAncestor<AwaitExpressionSyntax>(); if (awaitExpression != null) { return InferTypes(awaitExpression.Expression); } return SpecializedCollections.EmptyEnumerable<ITypeSymbol>(); }