code: def scratch_size_eltwise(self, op_def):
      input0_dims = self.get_op_input_dims(op_def, 0)
      return (
          len(input0_dims) * self.get_data_bytes(mace_pb2.DT_INT32) * 3
      )
  
imports: from py_proto import mace_pb2
  from utils.config_parser import ModelKeys
  from utils.util import mace_check
  from transform.base_converter import MaceKeyword
  from transform.base_converter import MaceOp
label_desc: Use image node_id 13 for calling the ScratchComputer obj's underlying member method code with example usage: obj.scratch_size_eltwise(op_def) and returns: unknown