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: example_test.go
    path of file: ./repos/go-cloud/runtimevar/awssecretsmanager
    
    the code of the file until where you have to start completion: // Copyright 2020 The Go Cloud Development Kit 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
//
//     https://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 awssecretsmanager_test

import (
	"context"
	"log"

	a
    
func Example_openVariableFromURL() {
	// PRAGMA: This example is used on gocloud.dev; PRAGMA comments adjust how it is shown and can be ignored.
	// PRAGMA: On gocloud.dev, add a blank import: _ "gocloud.dev/runtimevar/awssecretsmanager"
	// PRAGMA: On gocloud.dev, hide lines until the next blank line.
	ctx := context.Background()

	// runtimevar.OpenVariable creates a *runtimevar.Variable from a URL.
	// `secret-variable-name` must be a friendly name of the secret, NOT the Amazon Resource Name (ARN).
	v, err := runtimevar.OpenVariable(ctx, "awssecretsmanager://secret-variable-name?region=us-east-2&decoder=string")
	if err != nil {
		log.Fatal(err)
	}
	defer v.Close()

	// Use "awssdk=v1" or "v2" to force a specific AWS SDK version.
	vUsingV2, err := runtimevar.OpenVariable(ctx, "awssecretsmanager://secret-variable-name?region=us-east-2&decoder=string&awssdk=v2")
	if err != nil {
		log.Fatal(err)
	}
	defer vUsingV2.Close()
}