def connections(parameters)
      allowed_parameters = %w(from to via date time isArrivalTime
                              transportations limit page direct sleeper
                              couchette bike)

      query = create_query(parameters, allowed_parameters)
      locations = perform('connections', query)

      locations['connections']
    end
def connections(parameters)
      allowed_parameters = %w(from to via date time isArrivalTime
                              transportations limit page direct sleeper
                              couchette bike)

      query = create_query(parameters, allowed_parameters)
      locations = perform('connections', query)

      locations['connections']
    end
=> find connections