# File lib/docker/base.rb, line 10
  def initialize(connection, hash={})
    unless connection.is_a?(Docker::Connection)
      raise ArgumentError, "Expected a Docker::Connection, got: #{connection}."
    end
    normalize_hash(hash)
    @connection, @info, @id = connection, hash, hash['id']
    raise ArgumentError, "Must have id, got: #{hash}" unless @id
  end