docs(samples): add sample for insertColumn (#1684)
docs(samples): add sample for insertColumn (#1684)


stems/google-api-nodejs-client,googleapis/google-api-nodejs-client,stems/google-api-nodejs-client,stems/google-api-nodejs-client,googleapis/google-api-nodejs-client,stems/google-api-nodejs-client,googleapis/google-api-nodejs-client,stems/google-api-nodejs-client