lib/utils.js
function emitWarning(msg, type) {
  if (process.emitWarning) {
    process.emitWarning(msg, type);
  } else {
    process.nextTick(function() {
      console.warn(type + ': ' + msg);
    });
  }
}
function emitWarning(msg, type) {
  if (process.emitWarning) {
    process.emitWarning(msg, type);
  } else {
    process.nextTick(function() {
      console.warn(type + ': ' + msg);
    });
  }
}
function emitWarning ( msg , type ) { if ( process . emitWarning ) { process . emitWarning ( msg , type ) ; } else { process . nextTick ( function ( ) { console . warn ( type + ': ' + msg ) ; } ) ; } }
process.emitWarning or a polyfill
@see https://nodejs.org/api/process.html#process_process_emitwarning_warning_options
@ignore
process . emitWarning or a polyfill