/// <summary>
/// Creates a new id map.
/// </summary>
public UniqueIdMap(T defaultValue, int blockSize = 32)
{
_blocks = new HugeDictionary <long, Block>();
_blockSize = blockSize;
_defaultValue = defaultValue;
}
private readonly HugeDictionary <long, LinkedListNode> _secondMap; // holds the second and beyond vertices for a node.
/// <summary>
/// Creates a new core node id map.
/// </summary>
public CoreNodeIdMap()
{
_firstMap = new HugeDictionary <long, uint>();
_secondMap = new HugeDictionary <long, LinkedListNode>();
}