Invalid code in 03-first-program

[jbrelin]

The following code is not valid for making a node connection using nem-core-0.6.87. Will someone please correct?

import org.nem.core.model.primitive.BlockHeight;
import org.nem.core.model.Account;
import org.nem.core.connect.client.DefaultAsyncNemConnector;
import org.nem.core.connect.HttpMethodClient;
import org.nem.core.connect.ErrorResponseDeserializerUnion;
import org.nem.core.node.NodeEndpoint;
import org.nem.core.connect.client.NisApiId;
import org.nem.core.serialization.Deserializer;
import org.nem.core.model.BlockFactory;

node = NodeEndpoint.fromHost("87.98.159.171");
http = new HttpMethodClient();
conn = new DefaultAsyncNemConnector(http,
{e->throw new RuntimeException();});
conn.setAccountLookup(Account.metaClass.&invokeConstructor )
f=conn.getAsync(node,NisApiId.NIS_REST_CHAIN_HEIGHT,null)
bh = new BlockHeight(f.get())