class Sprockets::Cache

def initialize(cache = nil, logger = self.class.default_logger)

cache - A compatible backend cache store instance.

use Environment#cache to retreive a wrapped interface.
Always assign a backend cache store instance to Environment#cache= and

Internal: Wrap a backend cache store. 
def initialize(cache = nil, logger = self.class.default_logger)
  @cache_wrapper = get_cache_wrapper(cache)
  @fetch_cache   = Cache::MemoryStore.new(1024)
  @logger        = logger
end