@Nonnull
	public static String getCommonPrefix(@Nonnull String a, @Nonnull String b) {
		int len = Math.min(a.length(), b.length());
		for (int i = 0; i < len; i++) {
			if (a.charAt(i) != b.charAt(i)) {
				return a.substring(0, i);
			}
		}
		return a.substring(0, len);
	}
@param a
		Some string.
@param b
		Another.

@return The common prefix between the two strings.
recaf-core/src/main/java/software/coley/recaf/util/StringUtil.java