I have written code in GoLang then how get chain code using Hyper-ledger Fabric Composer? : I have setup **composer-rest-server** successfully using this link https://hyperledger.github.io/composer/latest/tutorials/deploy-to-fabric-single-org on IBM cloud.I have written custom logic code in **GoLang** for getting chain code.I don't know how will proceed for next setup for getting chain code.Could u help me, which way I have to go proceed?.