public void Join(int sourcePin, FlowNode dstNode, int dstPin)
{
bool result = NodeLinks.FindIndex(nodelink => nodelink.Equals(sourcePin, dstNode, dstPin)) != -1;
if (!result)
{
var newLink = new NodeLink();
newLink.Join(sourcePin, dstNode, dstPin);
NodeLinks.Add(newLink);
}
}
