code: function setShouldSendCallback(callback) {
  	    var original = this._globalOptions.shouldSendCallback;
  	    this._globalOptions.shouldSendCallback = keepOriginalCallback(original, callback);
  	    return this;
  	  }
docs: /*
  Set the shouldSendCallback option
  
  @param {function} callback The callback to run which allows
  introspecting the blob before sending
  @return {Raven}