please help
-- View this message in context: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/when-write-this-code-display-error-no-interface-expected-here-public-static-class-MyCoGrouper-extendn-tp2205p2219.html Sent from the Apache Flink User Mailing List archive. mailing list archive at Nabble.com.
