code: public ClosableIterator<NodeWithEmbeddedNodes> findEntities(HttpNeo4jClient executionEngine, EntityKey[] keys, Long txId) {
  		if ( singlePropertyKey ) {
  			return singlePropertyIdFindEntities( executionEngine, keys, txId );
  		}
  		else {
  			return multiPropertiesIdFindEntities( executionEngine, keys, txId );
  		}
  	}
docs: Find the nodes corresponding to an array of entity keys.
  
  @param executionEngine the {@link HttpNeo4jClient} used to run the query
  @param keys an array of keys identifying the nodes to return
  @return the list of nodes representing the entities