code: def _default_distance_uni(x_value: float, y_value: float):
      return abs(x_value - y_value)
  
imports: import copy
  from typing import Callable, Optional, Union
  import numpy
  import pandas
  import xarray
  from darts import TimeSeries
  from darts.logging import get_logger, raise_if, raise_if_not
  from darts.timeseries import DIMS
  from .cost_matrix import CostMatrix
  from .window import CRWindow, NoWindow, Window
label_desc: Use image node_id 7 for calling a global function with example usage: _default_distance_uni(x_value, y_value) and returns: abs