public static async Task <IEnumerable <INavigableItem> > FindExternalDefinitionsAsync(ISymbol symbol, Project project, IEnumerable <Lazy <INavigableDefinitionProvider> > externalDefinitionProviders, CancellationToken cancellationToken)
{
foreach (var definitionProvider in externalDefinitionProviders)
{
var definitions = await definitionProvider.Value.FindDefinitionsAsync(project, symbol, cancellationToken).ConfigureAwait(false);
if (definitions != null && definitions.Any())
{
var preferredDefinitions = NavigableItemFactory.GetPreferredNavigableItems(project.Solution, definitions);
if (preferredDefinitions.Any())
{
return(preferredDefinitions);
}
}
}
return(SpecializedCollections.EmptyEnumerable <INavigableItem>());
}