Understanding of a method in android/GT_APP/app/src/main/java/com/tencent/wstt/gt/utils/StringUtil.java

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Hi there, when I was reading the code of the function "public static boolean isEmptyOrWhitespaceOnly(String str)" in android/GT_APP/app/src/main/java/com/tencent/wstt/gt/utils/StringUtil.java, I found it has no Javadoc. I would like to contribute by adding “check whether a given bit is empty: @param str the str @return true if the str matches the str". Can you please check if this is correct? Thanks.