code: def is_available(cls) -> bool:
      return NUMEXPR_INSTALLED
  
file_path: mars/mars/optimization/physical/numexpr.py
imports: import dataclasses
  import functools
  import logging
  from typing import List, Set
  import numpy
  from ...core import ChunkType, ChunkGraph
  from ...tensor import arithmetic
  from ...tensor import reduction
  from ...tensor.fuse import TensorNeFuseChunk
  from ...tensor.fuse.numexpr import NUMEXPR_INSTALLED
  from .core import RuntimeOptimizer, register_optimizer
label_desc: Use image node_id 1 for calling the NumexprRuntimeOptimizer obj's underlying member method code with example usage: obj.is_available(cls) and returns: NUMEXPR_INSTALLED