code: def get_from_freq(
      cls, freq: str, add_trend: bool = DEFAULT_ADD_TREND
  ):
      offset = to_offset(freq)
  
      seasonal_issms: List[SeasonalityISSM] = []
  
      if offset.name == "M":
          seasonal_issms = [MonthOfYearSeasonalISSM()]
      elif norm_freq_str(offset.name) == "W":
          seasonal_issms = [WeekOfYearSeasonalISSM()]
      elif offset.name == "D":
          seasonal_issms = [DayOfWeekSeasonalISSM()]
      elif offset.name == "B":  # TODO: check this case
          seasonal_issms = [DayOfWeekSeasonalISSM()]
      elif offset.name == "H":
          seasonal_issms = [
              HourOfDaySeasonalISSM(),
              DayOfWeekSeasonalISSM(),
          ]
      elif offset.name == "T":
          seasonal_issms = [
              MinuteOfHourSeasonalISSM(),
              HourOfDaySeasonalISSM(),
          ]
      else:
          RuntimeError(f"Unsupported frequency {offset.name}")
  
      return cls(seasonal_issms=seasonal_issms, add_trend=add_trend)
  
imports: from typing import List, Sequence, Tuple
  from pandas.tseries.frequencies import to_offset
  from gluonts.core.component import validated
  from gluonts.mx import Tensor
  from gluonts.mx.distribution.distribution import getF
  from gluonts.mx.util import _broadcast_param
  from gluonts.time_feature import Constant, day_of_week_index, hour_of_day_index, minute_of_hour_index, month_of_year_index, TimeFeature, week_of_year_index, norm_freq_str
label_desc: Use image node_id 5 for calling the CompositeISSM obj's underlying member method code with example usage: obj.get_from_freq(cls, freq, add_trend) and returns: cls