code: def __init__(self):
      self._schema = None
      self._type_mapping = dict()
      self._name_offset_mapping = dict()
      self._offset_name_mapping = dict()
  
imports: import copy
  from typing import List, Union
  import pandas
  from .utils import AnonymousGenerator
label_desc: Use image node_id 1 to create a new SchemaManager object from inherited base classes: object with example: obj = SchemaManager()