code: def output_limit(self):
      if self._collocate:
          return (
              1
              + (self.label is not None)
              + (self.weight is not None)
              + (self.base_margin is not None)
          )
      return 1
  
imports: import itertools
  from typing import List, Union
  import numpy
  from ....None import opcodes
  from ....core import get_output_types, recursive_tile
  from ....core.context import get_context, Context
  from ....dataframe.core import DATAFRAME_TYPE
  from ....serialization.serializables import KeyField, Float64Field, ListField, BoolField
  from ....tensor.core import TENSOR_TYPE, TENSOR_CHUNK_TYPE
  from ....tensor import tensor
  from ....typing import TileableType, ChunkType
  from ....utils import has_unknown_shape, ensure_own_data, build_fetch
  from ...operands import LearnOperand, LearnOperandMixin
  from ...utils import convert_to_tensor_or_dataframe, concat_chunks
label_desc: Use image node_id 1 for calling the ToDMatrix obj's underlying member method code with example usage: obj.output_limit() and returns: int, unknown