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: waiter.go
    path of file: ./repos/docker-ce/components/engine/vendor/github.com/aws/aws-sdk-go/aws/request
    
    the code of the file until where you have to start completion: package request

import (
	"fmt"
	"time"

	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/awserr"
	"github.com/aws/aws-sdk-go/aws/awsutil"
)

// WaiterResourceNotReadyErrorCode is the error code returned by a waiter when
// the waiter's ma
    
func (m WaiterMatchMode) String() string {
	switch m {
	case PathAllWaiterMatch:
		return "pathAll"
	case PathWaiterMatch:
		return "path"
	case PathAnyWaiterMatch:
		return "pathAny"
	case PathListWaiterMatch:
		return "pathList"
	case StatusWaiterMatch:
		return "status"
	case ErrorWaiterMatch:
		return "error"
	default:
		return "unknown waiter match mode"
	}
}