class_docstr: Abstract base class for all document-level embeddings. Every new type of document embedding must implement these methods.
code: def embedding_type(self) -> str:
      return "sentence-level"
  
imports: import inspect
  import logging
  from abc import abstractmethod
  from typing import Any, Dict, Generic, List, Sequence, Type, Union
  import torch
  from torch.nn import Parameter, ParameterList
  import flair
  from flair.data import DT, Sentence
label_desc: Use image node_id 1 for calling the DocumentEmbeddings obj's underlying member method code with example usage: obj.embedding_type() and returns: str