code: def expect_true(self, expr: Expr, *, msg: str) -> None:
      expr = sympy_subs(expr, self.inv_precomputed_replacements)
      self.shape_env.defer_runtime_assert(
          expr, msg, fx_node=V.graph.current_node
      )
  
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 16 for calling the SizeVarAllocator obj's underlying member method code with example usage: obj.expect_true(expr) without return types