# File lib/rspec/core/filter_manager.rb, line 109
        def _warn_deprecated_key(key, updates)
          RSpec.warn_deprecation("\nDEPRECATION NOTICE: FilterManager#exclude(#{key.inspect} => #{updates[key].inspect}) is deprecated with no replacement, and will be removed from rspec-3.0.")
          @exclusions[key] = updates.delete(key)
        end