code: def aggregate(cls, dataset, dimensions, function, **kwargs):
      reduce_dims = [
          d.name for d in dataset.kdims if d not in dimensions
      ]
      return (
          dataset.data.reduce(function, dim=reduce_dims, **kwargs),
          [],
      )
  
imports: import sys
  import types
  import numpy
  import pandas
  from ..None import util
  from ..dimension import Dimension, asdim, dimension_name
  from ..element import Element
  from ..ndmapping import NdMapping, item_check, sorted_context
  from .grid import GridInterface
  from .interface import DataError, Interface
  from .util import dask_array_module, finite_range
label_desc: Use image node_id 15 for calling the XArrayInterface obj's underlying member method code with example usage: obj.aggregate(cls, dataset, dimensions, function) and returns: dataset,  list