AndrewJSchofield commented on code in PR #19758:
URL: https://github.com/apache/kafka/pull/19758#discussion_r2097734386


##########
tools/src/main/java/org/apache/kafka/tools/streams/StreamsGroupCommandOptions.java:
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@@ -23,18 +23,25 @@
 import org.slf4j.LoggerFactory;
 
 import java.util.Arrays;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 import java.util.stream.Collectors;
 
 import joptsimple.OptionSpec;
 
+import static org.apache.kafka.tools.ToolsUtils.minus;
+
 public class StreamsGroupCommandOptions extends CommandDefaultOptions {
     public static final Logger LOGGER = 
LoggerFactory.getLogger(StreamsGroupCommandOptions.class);
 
     public static final String BOOTSTRAP_SERVER_DOC = "REQUIRED: The server(s) 
to connect to.";
     public static final String GROUP_DOC = "The streams group we wish to act 
on.";
     public static final String LIST_DOC = "List all streams groups.";
     public static final String DESCRIBE_DOC = "Describe streams group and list 
offset lag related to given group.";
+    private static final String ALL_GROUPS_DOC = "Apply to all Streams 
groups.";

Review Comment:
   nit: It seems to me that the capitalization which we are using in general is 
"streams groups" rather than "Streams groups". I know that this is being used 
to support Kafka Streams, but I still contend that "streams groups" is better. 
Please could you align the capitalization across all messages in this tool. 
Thank you.



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