docs: def __split_name_unit(self, line):
          """
          Split a string that has value and unit as one.
          :param str line:
          :return str str:
          """
          vals = []
          unit = ''
          if line != '' or line != ' ':
              # If there are parenthesis, remove them
              line = line.replace('(', '').replace(')', '')
              # When value and units are a range (i.e. '100 m - 200 m').
              if re.match(re_name_unit_range, line):
                  m = re.findall(re_name_unit_range, line)
                  if m:
                      for group in m:
                          for item in group:
                              try:
                                  val = float(item)
                                  vals.append(val)
                              except ValueError:
                                  if item:
                                      unit = item
                  # Piece the number range back together.
                  if len(vals) == 1:
                      value = vals[0]
                  else:
                      value = str(vals[0]) + ' to ' + str(vals[1])
              else:
                  value, unit = self.__name_unit_regex(line)
              return value, unit