code: def test_debc019_del_item_from_class():
      c1 = Component(id="1")
      c2 = Component(id="2", children=c1)
      assert c2["1"] == c1
      del c2["1"]
      with pytest.raises(KeyError):
          c2["1"]
  
      assert c2.children is None
  
imports: import json
  import plotly
  import pytest
  from dash import __version__, Dash
  from dash import html
  from dash.development.base_component import Component
  from dash import dcc, Input, Output
label_desc: Use image node_id 20 for calling a global function with example usage: test_debc019_del_item_from_class() without return types