void mergeSetPrimary(final JComboBox<?> comboBox) {
		runSwing(() -> {
			ComboBoxModel<?> model = comboBox.getModel();
			for (int i = 0; i < model.getSize(); i++) {
				if (model.getElementAt(i).toString().equals("Merge & Set Primary")) {
					comboBox.setSelectedIndex(i);
					break;
				}
			}
			isMergeSetPrimary(comboBox);
		});
	}
Sets the indicated combo box selection to "Merge & Set Primary".
@param comboBox the combo box
Ghidra/Features/ProgramDiff/src/test.slow/java/ghidra/app/plugin/core/diff/DiffApplyTestAdapter.java