code: def __repr__(self):
      return "{name}({block!r}, {indexers})".format(
          name=self.__class__.__name__,
          block=self.block,
          indexers=self.indexers,
      )
  
imports: from collections import defaultdict
  import copy
  import numpy
  from pandas._libs import internals, tslibs
  from pandas.util._decorators import cache_readonly
  from pandas.core.dtypes.cast import maybe_promote
  from pandas.core.dtypes.common import _get_dtype, is_categorical_dtype, is_datetime64_dtype, is_datetime64tz_dtype, is_extension_array_dtype, is_float_dtype, is_numeric_dtype, is_sparse, is_timedelta64_dtype
  import pandas.core.dtypes.concat
  from pandas.core.dtypes.missing import isna
  import pandas.core.algorithms
label_desc: Use image node_id 2 for calling the JoinUnit obj's underlying member method code with example usage: obj.__repr__() and returns: str