code: def is_atomic(self):
      return True
  
file_path: mars/mars/dataframe/reduction/reduction_size.py
imports: from ...None import opcodes
  from ...core import OutputType
  from .core import DataFrameReductionOperand, DataFrameReductionMixin
label_desc: Use image node_id 1 for calling the DataFrameSize obj's underlying member method code with example usage: obj.is_atomic() and returns: True