/**
 * Sets the identifier token.
 *
 * An identifier token that is used to link an anonymous user to an existing Braze user profile. If the user is
 *  anonymous, calling this method with a new identifier token will start a new session upon calling `openSession`. If
 *  the user is not anonymous, this method is a no-op.
 *
 * @param identifierToken - The identifier token to link to the current user
 */
export declare function setIdentifierToken(identifierToken: string): Promise<void>;