/// <summary>
 /// Removes the ServerKeyVaultKey with KeyId from the server
 /// </summary>
 /// <param name="entity">The output of apply user input to model</param>
 /// <returns>The input entity</returns>
 protected override IEnumerable <AzureSqlServerKeyVaultKeyModel> PersistChanges(IEnumerable <AzureSqlServerKeyVaultKeyModel> entity)
 {
     ModelAdapter.Delete(this.ResourceGroupName, this.ServerName, this.KeyId);
     return(entity);
 }