private void CreateImportNodeIfRequired(string library, string hashKey = null)
{
if (null == hashKey)
{
string libraryPath = string.Empty;
if (GraphUtilities.TryGetImportLibraryPath(library, out libraryPath, out hashKey))
{
library = libraryPath;
}
}
if (!importNodesMapping.ContainsKey(hashKey))
{
importNodesMapping.Add(hashKey, GraphUtilities.GenerateUID());
}
gc.CreateImportNode(importNodesMapping[hashKey], library);
}