class Sass::CacheStores::Null

@private
This doesn’t currently have any use except for testing and debugging.
Doesn’t store anything, but records what things it should have stored.

def _retrieve(key, version, sha) 

def _retrieve(key, version, sha)
  nil
end

def _store(key, version, sha, contents) 

def _store(key, version, sha, contents)
  @keys[key] = true
end

def initialize 

def initialize
  @keys = {}
end

def was_set?(key) 

def was_set?(key)
  @keys[key]
end