func (a *Activation) IsStream() bool {
	return a.ImportType == Stream
}
IsStream returns true if an Activation is for a stream
package jwt
import (
	"crypto/sha256"
	"encoding/base32"
	"errors"
	"fmt"
	"strings"
	"github.com/nats-io/nkeys"
)
type Activation struct {
	ImportSubject Subject    `json:"subject,omitempty"`
	ImportType    ExportType `json:"type,omitempty"`
	Limits
}
func (a *Activation) IsService() bool {
	return a.ImportType == Service
}