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History.started = false;
 
// Set up all inheritable **Backbone.History** properties and methods.
_.extend(History.prototype, Events, {
 
  // The default interval to poll for hash changes, if necessary, is
  // twenty times a second.
  interval: 50,
 
  // Gets the true hash value. Cannot use location.hash directly due to bug
  // in Firefox where location.hash will always be decoded.
  getHash: function(window) {
    var match = (window || this).location.href.match(/#(.*)$/);
    return match ? match[1] : '';
  },
 
  // Get the cross-browser normalized URL fragment, either from the URL,
  // the hash, or the override.
  getFragment: function(fragment, forcePushState) {
    if (fragment == null) {
      if (this._hasPushState || !this._wantsHashChange || forcePushState) {