code: function createDefaultLogger(options) {
  	const ConsoleLogger = require('./console'),
  		consoleLogger = new ConsoleLogger(options),
  		config = _.mergeWith({
  			name: 'logger',
  			streams: [
  				{
  					level: options && options.level || 'trace',
  					type: 'raw',
  					stream: consoleLogger
  				}
  			]
  		}, options, function (a, b) {
  			return _.isArray(a) ? a.concat(b) : undefined;
  		});
  
  	consoleLogger.level = bunyan.resolveLevel(options && options.level || 'trace');
  
  	// default is to add the problem logger
  	if (!options || options.problemLogger || options.problemLogger === undefined) {
  		const ProblemLogger = require('./problem');
  		config.streams.push({
  			level: 'trace',
  			type: 'raw',
  			stream: new ProblemLogger(options)
  		});
  	}
  
  	const defaultLogger = bunyan.createLogger(config);
  	/**
  	 * Set log level
  	 * Backward compatible with Arrow Cloud MVC framework
  	 * @param {Object} nameOrNum log level in string or number
  	 * @return {String}
  	 */
  	defaultLogger.setLevel = function (nameOrNum) {
  		var level = 'trace';
  		try {
  			level = bunyan.resolveLevel(nameOrNum);
  		} catch (e) {} // eslint-disable-line no-empty
  		consoleLogger.level = level;
  		return this.level(level);
  	};
  	return defaultLogger;
  }
docs: Create a default logger
  
  @param  {Object} options - options
  @returns {Object}