class_docstr: Mixin class for flag and configuration settings management.
docstr: Create dynamic flag dictionary in self.
  
  Should be called in __init__ of the host class.
  Creates attribute [flag_attr_name]_dynamic containing an empty dict.
  
  Parameters
  ----------
  flag_attr_name : str, optional, default = "_flags"
      name of the flag attribute that is read
  
  Returns
  -------
  self : reference to self
code: def _init_flags(self, flag_attr_name="_flags"):
      """Create dynamic flag dictionary in self.
  
      Should be called in __init__ of the host class.
      Creates attribute [flag_attr_name]_dynamic containing an empty dict.
  
      Parameters
      ----------
      flag_attr_name : str, optional, default = "_flags"
          name of the flag attribute that is read
  
      Returns
      -------
      self : reference to self
      """
      setattr(self, f"{flag_attr_name}_dynamic", dict())
      return self
  
file_path: sktime/sktime/base/_tagmanager.py
imports: import inspect
  from copy import deepcopy
label_desc: Use image node_id 3 for calling the _FlagManager obj's underlying member method code with example usage: obj._init_flags(flag_attr_name) and returns: self