public boolean isEmpty() {
		return comparisonData.get(LEFT).isEmpty() || comparisonData.get(RIGHT).isEmpty();
	}
Returns true if the comparison window has no information to display in
either the left or right panel

@return true if the comparison window has no information to display
Ghidra/Features/Base/src/main/java/ghidra/features/base/codecompare/panel/FunctionComparisonPanel.java