Function emitNonThenableWarning

lib/diagnostics_channel.js:299–302

(fn)

}

function emitNonThenableWarning(fn) {
  process.emitWarning(`tracePromise was called with the function '${fn.name || '<anonymous>'}', ` +
                      'which returned a non-thenable.');
}

function channelFromMap(nameOrChannels, name, className) {
  if (typeof nameOrChannels === 'string') {