code: def size_hints(
      self,
      exprs: Iterable[Expr],
      *,
      fallback: Optional[int] = None,
  ) -> Tuple[int, ...]:
      return tuple(self.size_hint(x, fallback=fallback) for x in exprs)
  
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 27 for calling the SizeVarAllocator obj's underlying member method code with example usage: obj.size_hints(exprs) and returns: tuple