code: function RetryPolicyFilter(retryCount, retryInterval) {
    this.retryCount = retryCount ? retryCount : RetryPolicyFilter.DEFAULT_CLIENT_RETRY_COUNT;
    this.retryInterval = retryInterval ? retryInterval : RetryPolicyFilter.DEFAULT_CLIENT_RETRY_INTERVAL;
  }
docs: Creates a new RetryPolicyFilter instance.
  @class
  The RetryPolicyFilter allows you to retry operations,
  using a custom retry policy. Users are responsible to
  define the shouldRetry method.
  To apply a filter to service operations, use `withFilter`
  and specify the filter to be used when creating a service.
  @constructor
  @param {number} [retryCount=30000]        The client retry count.
  @param {number} [retryInterval=3]     The client retry interval, in milliseconds.
  
  @example
  var azure = require('azure-storage');
  var retryPolicy = new azure.RetryPolicyFilter();
  retryPolicy.retryCount = 3;
  retryPolicy.retryInterval = 3000;
  retryPolicy.shouldRetry = function(statusCode, retryContext) {
  
  };
  var blobService = azure.createBlobService().withFilter(retryPolicy);