lib/easylogger.js
function(transportType, formatter) {

    var exists = contains( cm.config.easylogger.transports
                         , { "key": "type", "value": transportType }
                         , "exists"
                         )
    // It is needed because transport type begins whit upper case if you add a new instance
    // but, in object, its property is saved beggining with lower chase
    var firstChar = transportType.charAt(0)
    transportType = transportType.replace(firstChar, firstChar.toLowerCase())

    if (exists) logger.transports[transportType].formatter = formatter
  }
function(transportType, formatter) {

    var exists = contains( cm.config.easylogger.transports
                         , { "key": "type", "value": transportType }
                         , "exists"
                         )
    // It is needed because transport type begins whit upper case if you add a new instance
    // but, in object, its property is saved beggining with lower chase
    var firstChar = transportType.charAt(0)
    transportType = transportType.replace(firstChar, firstChar.toLowerCase())

    if (exists) logger.transports[transportType].formatter = formatter
  }
Set custom formatter to trasnsports transportId : transport type where apply formatter formatter : function to format messages