code: def _is_sparse(cls, *args):
      if args and all(
          hasattr(x, "issparse") and x.issparse() for x in args
      ):
          return True
      return False
  
file_path: mars/mars/tensor/arithmetic/add.py
imports: import numpy
  from functools import reduce
  from ...None import opcodes
  from ...serialization.serializables import BoolField
  from ..array_utils import device, as_same_device
  from ..datasource import scalar
  from ..utils import infer_dtype
  from .core import TensorBinOp, TensorMultiOp
  from .utils import arithmetic_operand, tree_op_estimate_size, TreeReductionBuilder
label_desc: Use image node_id 1 for calling the TensorTreeAdd obj's underlying member method code with example usage: obj._is_sparse(cls) and returns: False, True