code: def test_Span() -> None:
      line = Span()
      assert line.location is None
      assert line.location_units == "data"
      assert line.dimension == "width"
      assert line.x_range_name == "default"
      assert line.y_range_name == "default"
      assert line.level == "annotation"
      assert line.editable is False
      check_line_properties(line, "", "black", 1.0)
      check_properties_existence(
          line,
          [
              *ANNOTATION,
              "location",
              "location_units",
              "dimension",
              "editable",
          ],
          LINE,
          HOVER_LINE,
      )
  
imports: from __future__ import annotations
  import pytest
  from datetime import datetime
  from unittest import mock
  from bokeh.core.properties import field, value
  from bokeh.core.validation import check_integrity, process_validation_issues
  from bokeh.models import Arrow, ArrowHead, Band, BoxAnnotation, ColorBar, ColumnDataSource, GlyphRenderer, Label, LabelSet, Legend, LegendItem, LinearColorMapper, Node, PolyAnnotation, Slope, Span, Title, Whisker
  from bokeh.util.serialization import convert_datetime_type
  from _util_models import ABOVE_FILL, ABOVE_HATCH, ANGLE, BELOW_FILL, BELOW_HATCH, FILL, HATCH, HOVER_FILL, HOVER_HATCH, HOVER_LINE, LINE, TEXT, check_fill_properties, check_hatch_properties, check_line_properties, check_properties_existence, check_text_properties, prefix
label_desc: Use image node_id 14 for calling a global function with example usage: test_Span() without return types