The phrase could refer to a few different things, so I'm not entirely sure which "feature" you're looking to develop. It is likely one of the following:
"Kettle" is the original name for the Pentaho Data Integration (PDI) tool. If you have a backup of a project or plugin in a file named kettle.7z , you might be asking about developing a new step , job entry , or transformation feature within that environment. kettle.7z
Some retro game archives (like those for the Amiga or Commodore 64) use .7z compression for game data. "Kettle" was a platform game for several 8-bit systems. You might be looking to develop a feature for a game engine or emulator to support this specific file. The phrase could refer to a few different