code: def missing_some(data, min_required, args):
      
      if min_required < 1:
          return []
      found = 0
      not_found = object()
      ret = []
      for arg in args:
          if get_var(data, arg, not_found) is not_found:
              ret.append(arg)
          else:
              found += 1
              if found >= min_required:
                  return []
      return ret
docs: Implements the missing_some operator for finding missing variables.