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 public interface GraphNode<T extends Object>Graph node which represents the object as a part of some hierarchy Classes implementing this interface should take care of equals and hashCode because they are used for testing the nodes for equality, and wrong implementation of these methods may lead to the wrong graph rendering, StackOverflow / OutOfMemory errors and so on. See example in NodeWrapper 
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                                Nested Class SummaryNested Classes Modifier and Type Class Description public classGraphNode.Companion
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                                Method SummaryModifier and Type Method Description abstract LabelgetLabel()Node label with all required information abstract List<GraphNode<T>>getInNodes()Nodes which are connected with the ingoing edges to this one: {this} <- {inNode} abstract List<GraphNode<T>>getOutNodes()Nodes which are connected with the outgoing edges to this one: {this} -> {outNode} abstract List<GraphNode<T>>getBiNodes()Nodes which are connected with the undirected edges to this one: {this} -- {biNode} - 
                    
                    
                    
                    
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                                Method Detail- 
                                        getInNodesabstract List<GraphNode<T>> getInNodes() Nodes which are connected with the ingoing edges to this one: {this} <- {inNode} 
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                                        getOutNodesabstract List<GraphNode<T>> getOutNodes() Nodes which are connected with the outgoing edges to this one: {this} -> {outNode} 
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                                        getBiNodesabstract List<GraphNode<T>> getBiNodes() Nodes which are connected with the undirected edges to this one: {this} -- {biNode} 
 
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