class RSpec::Core::World

def initialize(configuration=RSpec.configuration)
  @configuration = configuration
  @example_groups = [].extend(Extensions::Ordered::ExampleGroups)
  @shared_example_groups = {}
  @filtered_examples = Hash.new { |hash,group|
    hash[group] = begin
      examples = group.examples.dup
      examples = filter_manager.prune(examples)
      examples.uniq
      examples.extend(Extensions::Ordered::Examples)
    end
  }
end