```ruby
require 'yaml/store'

module CiInACan

  module Persistence

    def self.save type, id, value
      store = store_for(type)
      store.transaction { store[id] = value }
    end

    def self.find type, id
      store = store_for(type)
      store.transaction(true) { store[id] }
    end

    private

    def self.store_for type
      YAML::Store.new("#{CiInACan.results_location}/#{type}.yml")
    end

  end

end
```

Write a method to extract a hash from a pstore.
user
```ruby
require 'yaml/store'

module CiInACan

  module Persistence

    def self.save type, id, value
      store = store_for(type)
      store.transaction { store[id] = value }
    end

    def self.find type, id
      store = store_for(type)
      store.transaction(true) { store[id] }
    end

    def self.hash_for type
      store = store_for(type)
      store.transaction do
        store.roots.inject({}) { |t, i| t[i] = store[i]; t }
      end
    end

    private

    def self.store_for type
      YAML::Store.new("#{CiInACan.results_location}/#{type}.yml")
    end

  end

end
```
assistant