Integer findNextMatch(ValidatableLine line) {
		int searchPosition = 0;
		while (searchPosition < myLines.size()) {
			ValidatableLine myNextLine = myLines.get(searchPosition);
			if (line.matches(myNextLine)) {
				return searchPosition;
			}
			searchPosition++;
		}
		return null;
	}
Push forward the current marker position.  The marker starts at the beginning and 
only moves forward past validated lines.
Ghidra/Features/Base/src/main/java/ghidra/app/util/html/diff/DiffLinesValidator.java