public static async Task <NIType> GetTypeDiagramSignatureAsync(this Envoy typeDiagramEnvoy)
{
IProvideDataType typeDiagramCacheService = typeDiagramEnvoy.GetBasicCacheServices()
.OfType <IProvideDataType>()
.FirstOrDefault();
if (typeDiagramCacheService != null)
{
return(await typeDiagramCacheService.GetDataTypeAsync());
}
return(NIType.Unset);
}