class ActionView::LookupContext::DetailsKey

def self.clear
  @details_keys.clear
end

def self.digest_caches
  @details_keys.values
end

def self.get(details)
  if details[:formats]
    details = details.dup
    details[:formats] &= Template::Types.symbols
  end
  @details_keys[details] ||= Concurrent::Map.new
end