```ruby
require 'forwardable'

module FlipFab
  class FeaturesByName
    extend Forwardable

    def initialize features_by_name={}
      @features_by_name = features_by_name
    end

    def [] name
      raise "no feature has been defined with the name: #{name}" if @features_by_name[name].nil?
      @features_by_name[name]
    end

    def with_context context
      FeaturesByName.new Hash[@features_by_name.map{|name, feature| [name, (feature.with_context context)]}]
    end

    def_delegators :@features_by_name, :[]=, :clear, :count
  end
end
```

Add support for :each to FeaturesByName instances
user
```ruby
require 'forwardable'

module FlipFab
  class FeaturesByName
    extend Forwardable

    def initialize features_by_name={}
      @features_by_name = features_by_name
    end

    def [] name
      raise "no feature has been defined with the name: #{name}" if @features_by_name[name].nil?
      @features_by_name[name]
    end

    def with_context context
      FeaturesByName.new Hash[@features_by_name.map{|name, feature| [name, (feature.with_context context)]}]
    end

    def_delegators :@features_by_name, :[]=, :clear, :count, :each
  end
end
```
assistant