code: function(type, desc){
          this.assert(
              type == typeof this.obj
              , function(){ return 'expected ' + this.inspect + ' to be a ' + type + (desc ? " | " + desc : "") }
              , function(){ return 'expected ' + this.inspect + ' not to be a ' + type  + (desc ? " | " + desc : "") })
          return this;
      }
docs: Assert typeof.
  
  @param {Mixed} type
  @param {String} description
  @api public