protected String getCallFixupSelection() {
		if (callFixupComboBox != null) {
			String callFixup = (String) callFixupComboBox.getSelectedItem();
			if (callFixup != null && !NONE_CHOICE.equals(callFixup)) {
				return callFixup;
			}
		}
		return null;
	}
@return current call fixup selection from dialog or null
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/function/AbstractEditFunctionSignatureDialog.java