jodd-core/src/main/java/jodd/util/StringUtil.java
public static boolean isCharAtEscaped(final String src, int ndx, final char escapeChar) {
		if (ndx == 0) {
			return false;
		}
		ndx--;
		return src.charAt(ndx) == escapeChar;
	}
public static boolean isCharAtEscaped(final String src, int ndx, final char escapeChar) {
		if (ndx == 0) {
			return false;
		}
		ndx--;
		return src.charAt(ndx) == escapeChar;
	}
Returns <code>true</code> if character at provided index position is escaped
by escape character.