### Question:
GraphEntityMapper { public Object toNeo4JProperty(Object source) { if (source instanceof BigDecimal || source instanceof BigInteger) { return source.toString(); } else if ((source instanceof Calendar) || (source instanceof GregorianCalendar)) { return PropertyAccessorHelper.fromSourceToTargetClass(String.class, Date.class, ((Calendar) source).getTime()); } if (source instanceof Date) { Class<?> sourceClass = source.getClass(); return PropertyAccessorHelper.fromSourceToTargetClass(String.class, sourceClass, source); } return source; } GraphEntityMapper(Neo4JIndexManager indexer, final KunderaMetadata kunderaMetadata); Node getNodeFromEntity(Object entity, Object key, GraphDatabaseService graphDb, EntityMetadata m,
            boolean isUpdate); Node createProxyNode(Object sourceNodeId, Object targetNodeId, GraphDatabaseService graphDb,
            EntityMetadata sourceEntityMetadata, EntityMetadata targetEntityMetadata); Object getEntityFromNode(Node node, EntityMetadata m); Object getEntityFromRelationship(Relationship relationship, EntityMetadata topLevelEntityMetadata,
            Relation relation); Map<String, Object> createNodeProperties(Object entity, EntityMetadata m); void populateRelationshipProperties(EntityMetadata entityMetadata, EntityMetadata targetNodeMetadata,
            Relationship relationship, Object relationshipObj); Map<String, Object> createRelationshipProperties(EntityMetadata entityMetadata,
            EntityMetadata targetEntityMetadata, Object relationshipEntity); Object toNeo4JProperty(Object source); Object fromNeo4JObject(Object source, Field field); Node searchNode(Object key, EntityMetadata m, GraphDatabaseService graphDb, boolean skipProxy);  }### Answer:
@Test public void testToNeo4JProperty() { }