code: def _set_label(label, mark, dim, **kwargs):
      """Helper function to set labels for an axis"""
      if mark is None:
          mark = _context["last_mark"]
      if mark is None:
          return {}
      fig = kwargs.get("figure", current_figure())
      scales = mark.scales
      scale_metadata = mark.scales_metadata.get(dim, {})
      scale = scales.get(dim, None)
      if scale is None:
          return
      dimension = scale_metadata.get("dimension", scales[dim])
      axis = _fetch_axis(fig, dimension, scales[dim])
  
      if axis is not None:
          _apply_properties(axis, {"label": label})
  
imports: import sys
  from collections import OrderedDict
  from IPython.display import display
  from ipywidgets import Image
  from numpy import arange, issubdtype, array, column_stack, shape
  from .figure import Figure
  from bqscales import Scale, LinearScale, Mercator
  from .axes import Axis
  from .marks import Lines, Scatter, Hist, Bars, OHLC, Pie, Map, Image, Label, HeatMap, GridHeatMap, topo_load, Boxplot, Bins
  from .interacts import BrushIntervalSelector, FastIntervalSelector, BrushSelector, IndexSelector, MultiSelector, LassoSelector
  from traitlets.utils.sentinel import Sentinel
  import functools
label_desc: Use image node_id 11 for calling a global function with example usage: _set_label(label, mark, dim) and returns: dict