code: def is_available(cls) -> bool:
      return CP_INSTALLED
  
file_path: mars/mars/optimization/physical/cupy.py
imports: from ...tensor import arithmetic
  from ...tensor.fuse import TensorCpFuseChunk
  from ...utils import lazy_import
  from .core import RuntimeOptimizer, register_optimizer
label_desc: Use image node_id 1 for calling the CupyRuntimeOptimizer obj's underlying member method code with example usage: obj.is_available(cls) and returns: CP_INSTALLED