@SuppressWarnings("unchecked")
	@Before
	public void setup() throws Exception {
		constraint = new StringStartsWithColumnConstraint("");
		editor = constraint.getEditor(new TestColumnData());

		waitForTasks();
		forceBuildOfGuiComponents();
		textField = (DropDownTextField<String>) getInstanceField("textField", editor);
	}
A test for the various String constraints.
Ghidra/Framework/Docking/src/test/java/docking/widgets/table/constrainteditor/StringConstraintEditorTest.java