class_docstr: Base class for all the templates.
  Most of methods are abstract, with some exceptions to hold the common methods for all template, such as ``loss_ids``, ``save``, ``load``.
  
  Args:
      tokenizer (:obj:`PreTrainedTokenizer`): A tokenizer to appoint the vocabulary and the tokenization strategy.
      placeholder_mapping (:obj:`dict`): A place holder to represent the original input text.
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docstr: Template should rewrite this method if you need to process the batch input such as substituting embeddings.
          
docstr_tok: ["Template","should","rewrite","this","method","if","you","need","to","process","the","batch","input","such","as","substituting","embeddings","."]
code: def process_batch(self, batch):
      r"""Template should rewrite this method if you need to process the batch input such as substituting embeddings."""
      return batch
  
imports: from abc import abstractmethod
  from typing import *
  import paddle
  from data_utils import InputExample
label_desc: Use image node_id 9 for calling the ErnieManualTemplate obj's underlying member method code with example usage: obj.process_batch(batch) and returns: batch