lightning is not defined

[melvincarvalho]

In here :

lightning-rpc-explorer/app/rpcApi.js

Line 24 in b4cac1d

lightning.describeGraph({include_unannounced:true}, function(err, describeGraphResponse) {

I cant see anywhere in the code it's defined?

Refreshing network description...
(node:9903) UnhandledPromiseRejectionWarning: ReferenceError: lightning is not defined
    at /tmp/lightning-rpc-explorer/app/rpcApi.js:24:3