private boolean ignoreItem(T t) {
		if (ignoreNull(t)) {
			return true;
		}

		if (t == null) {
			return false; // not ignoring null
		}

		if (t.equals(getCurrentHistoryItem())) {
			return true;
		}
		return false;
	}
Returns the number of items in this history list

@return the number of items in this history list
Ghidra/Framework/Generic/src/main/java/util/HistoryList.java