return wi > wj // want larger weight first
		}
		// same weight, order by name/line number
		if ei.CallerName != ej.CallerName {
			return ei.CallerName < ej.CallerName
		}
		if ei.CalleeName != ej.CalleeName {
			return ei.CalleeName < ej.CalleeName
		}
		return ei.CallSiteOffset < ej.CallSiteOffset
	})
}

			ByWeight: []NamedCallEdge{
				{
					CallerName: "a",
					CalleeName: "b",
					CallSiteOffset: 14,
				},
				{
					CallerName: "c",
					CalleeName: "d",
					CallSiteOffset: 15,
				},
			},
			Weight: map[NamedCallEdge]int64{
				{
					CallerName: "a",
					CalleeName: "b",
					CallSiteOffset: 14,
				}: 2,
				{
					CallerName: "c",
					CalleeName: "d",
					CallSiteOffset: 15,
				}: 1,

		}

		co, err := strconv.Atoi(split[0])
		if err != nil {
			return nil, fmt.Errorf("preprocessed profile error processing call line: %w", err)
		}

		edge := NamedCallEdge{
			CallerName:     callerName,
			CalleeName:     calleeName,
			CallSiteOffset: co,
		}

		weight, err := strconv.ParseInt(split[1], 10, 64)
		if err != nil {
			return nil, fmt.Errorf("preprocessed profile error processing call weight: %w", err)
		}

				"random": []string{},
				"authorization": []string{
					"Basic callername",
				},
			},
			expectedToken:            "",
			extractBearerTokenErrMsg: "no bearer token exists in HTTP authorization header",
		},
		"With bearer token": {
			metadata: metadata.MD{
				"random": []string{},
				"authorization": []string{
					"Basic callername",
					"Bearer bearer-token",
				},
			},

//
// The format of the serialized output is as follows.
//
//      GO PREPROFILE V1
//      caller_name
//      callee_name
//      "call site offset" "call edge weight"
//      ...
//      caller_name
//      callee_name
//      "call site offset" "call edge weight"
//
// Entries are sorted by "call edge weight", from highest to lowest.

				"authorization": []string{
					"Basic callername",
				},
			},
			expectedErrMsg: "target JWT extraction error: no bearer token exists in HTTP authorization header",
		},
		"token not authenticated": {
			token: invlidToken,
			metadata: metadata.MD{
				"clusterid": []string{primaryCluster},
				"authorization": []string{
					"Basic callername",
				},
			},

	return nil
}

func (h *RegistrationHandler) validateVersions(
	callerName string,
	pluginName string,
	versions []string,
) (*utilversion.Version, error) {
	if len(versions) == 0 {
		return nil, errors.New(
			log(
				"%s for DRA plugin %q failed. Plugin returned an empty list for supported versions",
				callerName,
				pluginName,
			),
		)
	}

	// Validate version

	// edge weight.
	NamedEdgeMap NamedEdgeMap
}

// NamedCallEdge identifies a call edge by linker symbol names and call site
// offset.
type NamedCallEdge struct {
	CallerName     string
	CalleeName     string
	CallSiteOffset int // Line offset from function start line.
}

// NamedEdgeMap contains all unique call edges in the profile and their
// edge weight.
type NamedEdgeMap struct {

		}
		return err
	}

	return nil
}

func (h *RegistrationHandler) validateVersions(callerName, pluginName string, endpoint string, versions []string) (*utilversion.Version, error) {
	if len(versions) == 0 {
		return nil, errors.New(log("%s for CSI driver %q failed. Plugin returned an empty list for supported versions", callerName, pluginName))
	}

	// Validate version

		}
		parent = parent.parent
	}

	return raceErrors
}

// callerName gives the function name (qualified with a package path)
// for the caller after skip frames (where 0 means the current function).
func callerName(skip int) string {
	var pc [1]uintptr
	n := runtime.Callers(skip+2, pc[:]) // skip + runtime.Callers + callerName
	if n == 0 {
		panic("testing: zero callers found")
	}