***************************************************************************
@method _initializeResponses
@description Initializes all responses. If response is not an instance of
{@link carbond.OperationResponse}, it will be instantiated as
such.
@returns {undefined}
function() {
    for (var statusCode in this.responses) {
      var OperationResponse = _o('./OperationResponse')
      if (!(this.responses[statusCode] instanceof OperationResponse)) {
        if (_.isPlainObject(this.responses[statusCode])) {
          this.responses[statusCode] = o(this.responses[statusCode], OperationResponse)
        } else {
          throw new Error(
            'Malformed response spec. ' + JSON.stringify(this.responses[statusCode]))
        }
      }
    }
  }