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: export_test.go
    path of file: ./repos/google-cloud-go/bigtable
    
    the code of the file until where you have to start completion: /*
Copyright 2016 Google LLC

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 governin
    
func (e *EmulatedEnv) NewClient() (*Client, error) {
	o, err := btopt.DefaultClientOptions(e.server.Addr, e.server.Addr, Scope, clientUserAgent)
	if err != nil {
		return nil, err
	}
	// Add gRPC client interceptors to supply Google client information.
	//
	// Inject interceptors from headersInterceptor, since they are used to verify
	// client requests under test.
	o = append(o, btopt.ClientInterceptorOptions(
		headersInterceptor.StreamInterceptors(),
		headersInterceptor.UnaryInterceptors())...)

	timeout := 20 * time.Second
	ctx, _ := context.WithTimeout(context.Background(), timeout)

	o = append(o, option.WithGRPCDialOption(grpc.WithBlock()))
	o = append(o, option.WithGRPCDialOption(grpc.WithDefaultCallOptions(
		grpc.MaxCallSendMsgSize(100<<20), grpc.MaxCallRecvMsgSize(100<<20))))
	conn, err := gtransport.DialInsecure(ctx, o...)
	if err != nil {
		return nil, err
	}
	return NewClient(ctx, e.config.Project, e.config.Instance, option.WithGRPCConn(conn))
}