code: def mock_plot(trace_uid=None):
      # Build a mock to stand in for a PlotlyPlot subclass
      if trace_uid is None:
          trace_uid = str(uuid.uuid4())
  
      plot = Mock()
      plot.trace_uid = trace_uid
      return plot
  
imports: import uuid
  from unittest import TestCase
  from unittest.mock import Mock
  import plotly.graph_objs
  from holoviews import Tiles
  from holoviews.plotting.plotly.callbacks import BoundsXCallback, BoundsXYCallback, BoundsYCallback, RangeXCallback, RangeXYCallback, RangeYCallback, Selection1DCallback
  from holoviews.streams import BoundsX, BoundsXY, BoundsY, RangeX, RangeXY, RangeY, Selection1D
label_desc: Use image node_id 1 for calling a global function with example usage: mock_plot(trace_uid) and returns: plot