def locations(parameters)
      allowed_parameters = %w(query x y type)

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

      locations['stations']
    end
def locations(parameters)
      allowed_parameters = %w(query x y type)

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

      locations['stations']
    end
=> find locations