code: def to_cpu(df_or_series):
      if df_or_series.op.gpu is False:
          # if op.gpu is None, means unknown
          return df_or_series
  
      op = DataFrameToCPU()
      return op(df_or_series)
  
imports: from ...None import opcodes
  from .core import DataFrameDeviceConversionBase
label_desc: Use image node_id 1 for calling a global function with example usage: to_cpu(df_or_series) and returns: op, df_or_series