code: def test_deprecated_FuncTickFormatter() -> None:
      with pytest.warns(BokehDeprecationWarning):
          formatter = bmf.FuncTickFormatter()
          assert isinstance(formatter, bmf.CustomJSTickFormatter)
  
imports: from __future__ import annotations
  import pytest
  from bokeh.models import ColumnDataSource, Toggle
  from bokeh.util.warnings import BokehDeprecationWarning
  import bokeh.models.formatters
label_desc: Use image node_id 1 for calling a global function with example usage: test_deprecated_FuncTickFormatter() without return types