code: def check_inputs(self, inputs: List[TileableType]):
      if not inputs:
          return
  
      for inp in inputs:
          if inp is not None and inp._need_execution():
              raise ValueError(
                  f"{inp} has unknown dtypes, "
                  f"it must be executed first before {str(type(self))}"
              )
  
imports: import sys
  from typing import Any, Callable, Dict, List, Tuple, Type, Union
  import numpy
  from ...metrics import Metrics
  from ...typing import TileableType, ChunkType, OperandType
  from ...utils import calc_data_size
  from ..context import Context
  from ..mode import is_eager_mode
  from ..entity import OutputType, ExecutableTuple, get_chunk_types, get_tileable_types, get_output_types, get_fetch_class
label_desc: Use image node_id 1 for calling the TileableOperandMixin obj's underlying member method code with example usage: obj.check_inputs(inputs) without return types