public AliasAndUsingDirective(AliasSymbol alias, UsingDirectiveSyntax?usingDirective)
{
this.Alias = alias;
this.UsingDirectiveReference = usingDirective?.GetReference();
}
public NamespaceOrTypeAndUsingDirective(NamespaceOrTypeSymbol namespaceOrType, UsingDirectiveSyntax?usingDirective, ImmutableArray <AssemblySymbol> dependencies)
{
this.NamespaceOrType = namespaceOrType;
this.UsingDirectiveReference = usingDirective?.GetReference();
this.Dependencies = dependencies.NullToEmpty();
}