constructor() {
        /**
         * Specifies Read access granted.
         */
        this.read = false;
        /**
         * Specifies Add access granted.
         */
        this.add = false;
        /**
         * Specifies Create access granted.
         */
        this.create = false;
        /**
         * Specifies Write access granted.
         */
        this.write = false;
        /**
         * Specifies Delete access granted.
         */
        this.delete = false;
        /**
         * Specifies Delete version access granted.
         */
        this.deleteVersion = false;
        /**
         * Specfies Tag access granted.
         */
        this.tag = false;
        /**
         * Specifies Move access granted.
         */
        this.move = false;
        /**
         * Specifies Execute access granted.
         */
        this.execute = false;
        /**
         * Specifies SetImmutabilityPolicy access granted.
         */
        this.setImmutabilityPolicy = false;
        /**
         * Specifies that Permanent Delete is permitted.
         */
        this.permanentDelete = false;
    }
ONLY AVAILABLE IN NODE.JS RUNTIME.

This is a helper class to construct a string representing the permissions granted by a ServiceSAS to a blob. Setting
a value to true means that any SAS which uses these permissions will grant permissions for that operation. Once all
the values are set, this should be serialized with toString and set as the permissions field on a
{@link BlobSASSignatureValues} object. It is possible to construct the permissions string without this class, but
the order of the permissions is particular and this class guarantees correctness.