Fix use of RelationshipType after rebase

Author: DarthMax

core/src/main/java/org/neo4j/graphalgo/core/loading/GraphStore.java

@@ -91,7 +91,7 @@ public static GraphStore of(
             nodePropertyStores.put(nodeLabel, builder.build());
         });
 
-        Map<String, RelationshipPropertyStore> relationshipPropertyStores = new HashMap<>();
+        Map<RelationshipType, RelationshipPropertyStore> relationshipPropertyStores = new HashMap<>();
         relationshipProperties.forEach((relationshipType, propertyMap) -> {
             RelationshipPropertyStore.Builder builder = RelationshipPropertyStore.builder();
             propertyMap.forEach((propertyKey, propertyValues) -> builder.putRelationshipProperty(
@@ -323,7 +323,7 @@ public void addRelationshipType(
     }
 
     private void addRelationshipProperty(
-        String relationshipType,
+        RelationshipType relationshipType,
         String propertyKey,
         NumberType propertyType,
         HugeGraph.PropertyCSR propertyCSR,

core/src/test/java/org/neo4j/graphalgo/core/write/RelationshipExporterTest.java

@@ -26,6 +26,7 @@
 import org.neo4j.graphalgo.Orientation;
 import org.neo4j.graphalgo.PropertyMapping;
 import org.neo4j.graphalgo.RelationshipProjection;
+import org.neo4j.graphalgo.RelationshipType;
 import org.neo4j.graphalgo.StoreLoaderBuilder;
 import org.neo4j.graphalgo.TestDatabaseCreator;
 import org.neo4j.graphalgo.api.Graph;
@@ -104,7 +105,7 @@ void exportRelationshipsWithLongProperties() {
             .graphStore(NativeFactory.class);
 
         RelationshipExporter
-            .of(db, graphStore.getGraph("NEW_REL", Optional.of("newWeight")), RUNNING_TRUE)
+            .of(db, graphStore.getGraph(RelationshipType.of("NEW_REL"), Optional.of("newWeight")), RUNNING_TRUE)
             .withRelationPropertyTranslator(relProperty -> Values.longValue((long) relProperty))
             .build()
             .write("NEW_REL", "newWeight");