class_docstr: A filter which ensures that time series have the specified minimum length.
code: def __init__(self, length: int):
      self.length = length
  
imports: from abc import ABC, abstractmethod
  from typing import Any, Dict, List
  import numpy
  from gluonts.dataset.field_names import FieldName
label_desc: Use image node_id 1 to create a new MinLengthFilter object from inherited base classes: Filter with example: obj = MinLengthFilter(length)