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: getlayermountpath.go
    path of file: ./repos/teller/vendor/github.com/Microsoft/hcsshim/internal/wclayer
    
    the code of the file until where you have to start completion: package wclayer

import (
	"context"
	"syscall"

	"github.com/Microsoft/hcsshim/internal/hcserror"
	"github.com/Microsoft/hcsshim/internal/log"
	"github.com/Microsoft/hcsshim/internal/oc"
	"go.opencensus.io/trace"
)

// GetLayerMountPath will look for a mounted layer with the given path and return
// the path at w
    
func GetLayerMountPath(ctx context.Context, path string) (_ string, err error) {
	title := "hcsshim::GetLayerMountPath"
	ctx, span := trace.StartSpan(ctx, title)
	defer span.End()
	defer func() { oc.SetSpanStatus(span, err) }()
	span.AddAttributes(trace.StringAttribute("path", path))

	var mountPathLength uintptr
	mountPathLength = 0

	// Call the procedure itself.
	log.G(ctx).Debug("Calling proc (1)")
	err = getLayerMountPath(&stdDriverInfo, path, &mountPathLength, nil)
	if err != nil {
		return "", hcserror.New(err, title+" - failed", "(first call)")
	}

	// Allocate a mount path of the returned length.
	if mountPathLength == 0 {
		return "", nil
	}
	mountPathp := make([]uint16, mountPathLength)
	mountPathp[0] = 0

	// Call the procedure again
	log.G(ctx).Debug("Calling proc (2)")
	err = getLayerMountPath(&stdDriverInfo, path, &mountPathLength, &mountPathp[0])
	if err != nil {
		return "", hcserror.New(err, title+" - failed", "(second call)")
	}

	mountPath := syscall.UTF16ToString(mountPathp[0:])
	span.AddAttributes(trace.StringAttribute("mountPath", mountPath))
	return mountPath, nil
}