    # File lib/fog/aws/requests/compute/start_instances.rb, line 32
            def start_instances(instance_id)
              instance_ids = Array(instance_id)

              instance_set = self.data[:instances].values
              instance_set = apply_tag_filters(instance_set, {'instance_id' => instance_ids}, 'instanceId')
              instance_set = instance_set.find_all {|x| instance_ids.include?(x["instanceId"]) }

              if instance_set.empty?
                raise Fog::Compute::AWS::NotFound.new("The instance ID '#{instance_ids.first}' does not exist")
              else
                response = Excon::Response.new
                response.status = 200

                response.body = {
                  'instancesSet' => instance_set.inject([]) do |ia, instance|
                                      ia << {'currentState' => { 'code' => 0, 'name' => 'pending' },
                                             'previousState' => instance['instanceState'],
                                             'instanceId' => instance['instanceId'] }
                                      instance['instanceState'] = {'code'=>0, 'name'=>'pending'}
                                      ia
                  end
                }
                response
              end
            end