constructor() {
        /**
         * Permission to access blob resources granted.
         */
        this.blob = false;
        /**
         * Permission to access file resources granted.
         */
        this.file = false;
        /**
         * Permission to access queue resources granted.
         */
        this.queue = false;
        /**
         * Permission to access table resources granted.
         */
        this.table = false;
    }
ONLY AVAILABLE IN NODE.JS RUNTIME.

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