"type": "string",
                            "format": "date-time",
                        },
                        "end_datetime": {
                            "title": "End Datetime",
                            "type": "string",
                            "format": "date-time",
                        },
                        "repeat_at": IsDict(

            return cl.call()
        }
    }

    def format(Node... nodes) {
        format(nodes as List)
    }

    def formatTree(Node... nodes) {
        formatTree(nodes as List)
    }

    def formatTree(Iterable<? extends Node> nodes) {
        format(nodes, true)
    }

    def format(Iterable<? extends Node> nodes, boolean prettyPrint = false) {

        if (value == null) {
            return null;
        }

        try {
            if (PDF_DATE.equals(format)) {
                final Calendar cal = DateConverter.toCalendar(value);
                return cal != null ? cal.getTime() : null;
            }

            final long time = Joda.forPattern(format).parseMillis(value);

	}()

	Red = func() func(format string, a ...interface{}) string {
		if IsTerminal() {
			return color.New(color.FgRed).SprintfFunc()
		}
		return fmt.Sprintf
	}()

	Blue = func() func(format string, a ...interface{}) string {
		if IsTerminal() {
			return color.New(color.FgBlue).SprintfFunc()
		}
		return fmt.Sprintf
	}()

	Yellow = func() func(format string, a ...interface{}) string {

	"testing"
)

func TestSDSWriterSecretItems(t *testing.T) {
	tests := []struct {
		name       string
		format     Format
		items      []SecretItem
		expected   []string
		unexpected []string
	}{
		{
			name:       "test tabular output with no secret items is equivalent to the header",
			format:     TABULAR,
			items:      []SecretItem{},
			expected:   []string{},
			unexpected: secretItemColumns,
		},
		{

// parsing.
type Error struct {
	err error
}

// Errorf - formats according to a format specifier and returns
// the string as a value that satisfies error of type tagging.Error
func Errorf(format string, a ...interface{}) error {
	return Error{err: fmt.Errorf(format, a...)}
}

// Unwrap the internal error.
func (e Error) Unwrap() error { return e.err }

// parsing.
type Error struct {
	err error
}

// Errorf - formats according to a format specifier and returns
// the string as a value that satisfies error of type tagging.Error
func Errorf(format string, a ...interface{}) error {
	return Error{err: fmt.Errorf(format, a...)}
}

// Unwrap the internal error.
func (e Error) Unwrap() error { return e.err }

	}
}

// TestParseCredentialHeader - validates the format validator and extractor for the Credential header in an aws v4 request.
// A valid format of credential should be of the following format.
// Credential = accessKey + SlashSeparator+ scope
// where scope = string.Join([]string{  currTime.Format(yyyymmdd),
//
//				globalMinioDefaultRegion,
//	              	"s3",
//			        "aws4_request",

                            "type": "string",
                            "format": "date-time",
                        },
                        "end_datetime": {
                            "title": "End Datetime",
                            "type": "string",
                            "format": "date-time",
                        },
                        "repeat_at": IsDict(

  # Retrieve Envoy server metrics in prometheus format
  istioctl experimental envoy-stats <pod-name[.namespace]> --output prom

  # Retrieve Envoy server metrics in prometheus format with custom proxy admin port
  istioctl experimental envoy-stats <pod-name[.namespace]> --output prom --proxy-admin-port 15000

  # Retrieve Envoy server metrics in prometheus format with merged application metrics