You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: impl.go
    path of file: ./repos/chaos-mesh/controllers/chaosimpl/awschaos/ec2stop
    
    the code of the file until where you have to start completion: // Copyright 2021 Chaos Mesh Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

package ec2stop

import (
	"context"
	"encoding/json"

	"github.com/aws/aws-sdk-go-v2/aws"
	awscfg "github.com/aws/aws-sdk-go-v2/config"
	"github.com/aws/aws-sdk-go-v2/credentials"
	"github.com/aws/aws-sdk-go-v2/service/ec2"
	"github.com/go-logr/logr"
	v1 "k8s.io/api/core/v1"
	"k8s.io/apimachinery/pkg/types"
	"sigs.k8s.io/controller-runtime/pkg/client"

	"github.com/chaos-mesh/chaos-mesh/api/v1alpha1"
	impltypes "github.com/chaos-mesh/chaos-mesh/controllers/chaosimpl/types"
)

var _ impltypes.ChaosImpl = (*Impl)(nil)

type Impl struct {
	client.Client

	Log logr.Logger
}

func (impl *Impl) Apply(ctx context.Context, index int, records []*v1alpha1.Record, obj v1alpha1.InnerObject) (v1alpha1.Phase, error) {
	awschaos := obj.(*v1alpha1.AWSChaos)

	var selected v1alpha1.AWSSelector
	err := json.Unmarshal([]byte(records[inde
    
func (impl *Impl) Recover(ctx context.Context, index int, records []*v1alpha1.Record, obj v1alpha1.InnerObject) (v1alpha1.Phase, error) {
	awschaos := obj.(*v1alpha1.AWSChaos)

	var selected v1alpha1.AWSSelector
	err := json.Unmarshal([]byte(records[index].Id), &selected)
	if err != nil {
		impl.Log.Error(err, "fail to unmarshal the selector")
		return v1alpha1.NotInjected, err
	}

	opts := []func(*awscfg.LoadOptions) error{
		awscfg.WithRegion(selected.AWSRegion),
	}

	if selected.Endpoint != nil {
		opts = append(opts, awscfg.WithEndpointResolver(aws.EndpointResolverFunc(func(service, region string) (aws.Endpoint, error) {
			return aws.Endpoint{URL: *selected.Endpoint, SigningRegion: region}, nil
		})))
	}
	if awschaos.Spec.SecretName != nil {
		secret := &v1.Secret{}
		err := impl.Client.Get(ctx, types.NamespacedName{
			Name:      *awschaos.Spec.SecretName,
			Namespace: awschaos.Namespace,
		}, secret)
		if err != nil {
			impl.Log.Error(err, "fail to get cloud secret")
			return v1alpha1.Injected, err
		}
		opts = append(opts, awscfg.WithCredentialsProvider(credentials.NewStaticCredentialsProvider(
			string(secret.Data["aws_access_key_id"]),
			string(secret.Data["aws_secret_access_key"]),
			string(secret.Data["aws_session_token"]),
		)))
	}
	cfg, err := awscfg.LoadDefaultConfig(ctx, opts...)
	if err != nil {
		impl.Log.Error(err, "unable to load aws SDK config")
		return v1alpha1.Injected, err
	}
	ec2client := ec2.NewFromConfig(cfg)

	_, err = ec2client.StartInstances(context.TODO(), &ec2.StartInstancesInput{
		InstanceIds: []string{selected.Ec2Instance},
	})

	if err != nil {
		impl.Log.Error(err, "fail to start the instance")
		return v1alpha1.Injected, err
	}

	return v1alpha1.NotInjected, nil
}