Which imports for IS java services?

When coding webMethod IS services in java that extends com.wm.app.b2server.service using a third party IDE, which file we need to import->

SERVER_ROOT\lib\webmethods.jar
SERVER_ROOT\lib\classess.jar
SERVER_ROOT\lib\server.jar
SERVER_ROOT\lib\client.zip
SERVER_ROOT\lib\java.zip

Client.jar is required for the class (com.wm.app.b2server.service ) you are looking for .