CubDB.fetch

You're seeing just the function fetch, go back to CubDB module for more information.

fetch(db, key)

fetch(GenServer.server(), key()) :: {:ok, value()} | :error

Fetches the value for the given key in the database, or return :error if key is not present.

If the database contains an entry with the given key and value value, it returns {:ok, value}. If key is not found, it returns :error.