Github user mxm commented on a diff in the pull request: https://github.com/apache/flink/pull/2275#discussion_r73159038 --- Diff: flink-core/src/main/java/org/apache/flink/util/Preconditions.java --- @@ -293,6 +293,16 @@ private static String format(@Nullable String template, @Nullable Object... args return builder.toString(); } + + /** + * Returns {@code true} if the given string is null or is the empty string. + * @param string a string reference to check + * @return {@code true} if the string is null or is the empty string + */ + public static boolean isNullOrEmpty(@Nullable String string) { --- End diff -- Yes, even better :)
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