code: function (serviceName) {
        if (serviceName.indexOf('.') > 0) {
          return clients[serviceName]
        }
  
        return _.find(clients, (v, k) => {
          const lastDot = k.lastIndexOf('.')
          if (lastDot) {
            return k.substring(lastDot + 1) === serviceName
          }
        })
      }
docs: Gets the gRPC service / client object / function
  @param  {serviceName} serviceName The service name. Can and should include package.
  @return {Object} the Client object
  @memberof descriptor
  @example
  const grpcinspect = require('grpc-inspect')
  const grpc = require('grpc')
  const pbpath = path.resolve(__dirname, './route_guide.proto')
  const proto = grpc.load(pbpath)
  const d = grpcinspect(proto)
  console.dir(d.client('RouteGuide'))
  console.dir(d.client('routeguide.RouteGuide'))