jodd-core/src/main/java/jodd/util/CharSequenceUtil.java
public static int findFirstEqual(final CharSequence source, final int index, final CharSequence match) {
		for (int i = index; i < source.length(); i++) {
			if (equalsOne(source.charAt(i), match)) {
				return i;
			}
		}
		return -1;
	}
public static int findFirstEqual(final CharSequence source, final int index, final CharSequence match) {
		for (int i = index; i < source.length(); i++) {
			if (equalsOne(source.charAt(i), match)) {
				return i;
			}
		}
		return -1;
	}
Finds index of the first character in given charsequence the matches any from the
given set of characters.

@return index of matched character or -1