läpikäypä

I’m not finding a widely recognized definition for “läpikäypä.” Could you provide the domain or context (for example, linguistics, culture, a place, a product name, etc.)? If you’d like, I can proceed in one of two ways:

- Write a concise, factual wiki-style article based on reliable sources (once you confirm the domain and any sources you want referenced).

- Create a clearly labeled fictional article about a term named “läpikäypä” (for creative or world-building purposes).

Please tell me which option you prefer, and any context or details you’d like included.