code: function Migrator(sequelize, options) {
  
          this.sequelize = sequelize;
          this.options = Utils._.extend({
              path:        __dirname + '/../migrations',
              from:        null,
              to:          null,
              logging:     console.log,
              filesFilter: /\.js$/
          }, options || {});
  
          if (this.options.logging === true) {
              console.log('DEPRECATION WARNING: The logging-option should be either a function or false. Default: console.log');
              this.options.logging = console.log;
          }
  
          if (this.options.logging == console.log) {
              // using just console.log will break in node < 0.6
              this.options.logging = function(s) { console.log(s); }
          }
  
      }
docs: Sequelize Migrator class.
  @class Migrator
  @param {object} sequelize - the sequelize instance.
  @param {object} [options] - the migration options.
  @constructor