public static boolean containsNone(CharSequence cs, char... searchChars) {
		if (cs == null || searchChars == null) {
			return true;
		}
		int csLen = cs.length();
		int csLast = csLen - 1;
		int searchLen = searchChars.length;
		int searchLast = searchLen - 1;
		for (int i = 0; i < csLen; i++) {
			char ch = cs.charAt(i);
			for (int j = 0; j < searchLen; j++) {
				if (searchChars[j] == ch) {
					if (Character.isHighSurrogate(ch)) {
						if (j == searchLast) {
							// missing low surrogate, fine, like
							// String.indexOf(String)
							return false;
						}
						if (i < csLast
								&& searchChars[j + 1] == cs.charAt(i + 1)) {
							return false;
						}
					} else {
						// ch is in the Basic Multilingual Plane
						return false;
					}
				}
			}
		}
		return true;
	}