code: def changes_found(self):
          
          if self.dest is None:
              warnings.warn("dest directory not found!")
          if self.src is None:
              warnings.warn("src directory not found!")
          if self.src is None or self.dest is None:
              return False
          dest_mtime = -1
          src_mtime = os.path.getmtime(self.src)
          if os.path.exists(self.dest):
              dest_mtime = os.path.getmtime(self.dest)
  
          if src_mtime >= dest_mtime:
              return True # changes found
  
          for folder, _, files in os.walk(self.src):
              for filename in fnmatch.filter(files, '*.scss'):
                  src_path = os.path.join(folder, filename)
                  if os.path.getmtime(src_path) >= dest_mtime:
                      return True 
          return False
docs: Returns True if the target folder is older than the source folder.