At present, we have changed, added, deleted, untracked methods but no boolean methods for checking the members of the Enumerable. Example: ```ruby def changed @files.select { |k, f| f.type == 'M' } end ``` Proposed: ``` def changed?(file) changed.member?(file) end ``` This will allow interaction based on whether a file is changed as expected or not. ``` if changed?(file.rb) # start things end