private static IType TryGetQualifierExpressionType([NotNull] IReferenceExpression referenceExpression)
{
var qualifierExpression = referenceExpression.QualifierExpression;
if (qualifierExpression.IsThisOrBaseOrNull())
{
var typeDeclaration = referenceExpression.GetContainingTypeDeclaration();
if (typeDeclaration is IStructDeclaration {
DeclaredElement : { } structTypeElement
})