code: def guard_equals(self, left: Expr, right: Expr) -> Expr:
      if isinstance(left, Expr):
          left = sympy_subs(left, self.inv_precomputed_replacements)
      if isinstance(right, Expr):
          right = sympy_subs(right, self.inv_precomputed_replacements)
      assert self.shape_env.evaluate_expr(sympy.Eq(left, right))
      return left
  
imports: import functools
  import itertools
  import logging
  from typing import Any, Callable, Dict, Iterable, List, Optional, Set, Tuple, Union
  import sympy
  from sympy import Expr
  from torch.fx.experimental.symbolic_shapes import ShapeEnv
  from torch.utils._sympy.functions import FloorDiv, ModularIndexing
  from torch.utils._sympy.value_ranges import bound_sympy
  from .utils import sympy_subs, sympy_symbol, VarRanges
  from .virtualized import V
label_desc: Use image node_id 13 for calling the SizeVarAllocator obj's underlying member method code with example usage: obj.guard_equals(left, right) and returns: left