private AttributeListSyntax CreateInternalVisibleToAttributeList(Project project, Project[] allProjects)
{
var testProjects = allProjects.Where(x => x.ProjectReferences.Any(y => y.ProjectId == project.Id)).ToArray();
if (testProjects.Length == 0)
return null;
List<AttributeSyntax> attrs = testProjects.Select(CreateInternalVisibleToAttribute).ToList();
var attributeList = new SeparatedSyntaxList<AttributeSyntax>();
attributeList = attributeList.AddRange(attrs);
var assemblyLevelSpecifier =
SyntaxFactory.AttributeTargetSpecifier(SyntaxFactory.Token(SyntaxKind.AssemblyKeyword));
return SyntaxFactory.AttributeList(assemblyLevelSpecifier, attributeList);
}