docstr: Add grammar correlation option for ABSA.
docstr_tok: ["Add","grammar","correlation","option","for","ABSA","."]
code: def _add_head_matrix_options(
      self, head_matrix_options: List[str]
  ) -> List[str]:
      """Add grammar correlation option for ABSA."""
      for model_name in self.model_names:
          head_matrix_options += [f"{model_name}_grammar_correlation"]
      if self.mode == "compare":
          head_matrix_options += ["grammar_correlation_delta"]
  
      return head_matrix_options
  
imports: from typing import List, Tuple, Dict, Union
  from abc import ABC, abstractmethod
  import torch
  import pandas
  import numpy
label_desc: Use image node_id 3 for calling the ABSATask obj's underlying member method code with example usage: obj._add_head_matrix_options(head_matrix_options) and returns: head_matrix_options