Downcast to NodeEntity to get stable signature

Neo4j 4 and 5 return a different type for the method

org.neo4j.graphdb.Node#getRelationships()

This causes a bytecode error, because the compiler records the exact
type of the method known at compile time.
There is no such one method that is the same across the Neo4j versions.

Co-authored-by: Adam Schill Collberg <adam.schill.collberg@protonmail.com>

Author: Mats-SX

alpha/alpha-proc/src/main/java/org/neo4j/gds/linkprediction/NeighborsFinder.java

@@ -23,6 +23,7 @@
 import org.neo4j.graphdb.Node;
 import org.neo4j.graphdb.Relationship;
 import org.neo4j.graphdb.RelationshipType;
+import org.neo4j.kernel.impl.core.NodeEntity;
 
 import java.util.Collections;
 import java.util.HashSet;
@@ -57,7 +58,7 @@ public Set<Node> findNeighbors(Node node1, Node node2, RelationshipType relation
     public Set<Node> findNeighbors(Node node, RelationshipType relationshipType, Direction direction) {
         Set<Node> neighbors = new HashSet<>();
 
-        for (Relationship rel : loadRelationships(node, relationshipType, direction)) {
+        for (Relationship rel : loadRelationships((NodeEntity) node, relationshipType, direction)) {
             Node endNode = rel.getOtherNode(node);
 
             if (!endNode.equals(node)) {
@@ -79,15 +80,15 @@ private Direction flipDirection(Direction direction) {
     }
 
     private boolean noCommonNeighbors(Node node, RelationshipType relationshipType, Direction direction, Node node2) {
-        for (Relationship rel : loadRelationships(node, relationshipType, direction)) {
+        for (Relationship rel : loadRelationships((NodeEntity) node, relationshipType, direction)) {
             if (rel.getOtherNode(node).equals(node2)) {
                 return false;
             }
         }
         return true;
     }
 
-    private Iterable<Relationship> loadRelationships(Node node, RelationshipType relationshipType, Direction direction) {
+    private Iterable<Relationship> loadRelationships(NodeEntity node, RelationshipType relationshipType, Direction direction) {
         return relationshipType == null
             ? node.getRelationships(direction)
             : node.getRelationships(direction, relationshipType);