code: def update_title(attrname, old, new):
      plot.title.text = text.value
  
imports: import numpy
  from bokeh.io import curdoc
  from bokeh.layouts import column, row
  from bokeh.models import ColumnDataSource, Slider, TextInput
  from bokeh.plotting import figure
label_desc: Use image node_id 1 for calling a global function with example usage: update_title(attrname, old, new) without return types