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realplord (1) [Avatar] Offline
From the first paragraph of 11.5.1:
"To do this, in the next listing youÂ’ll refactor the first part of the implementation
from listing 11.12 into a findPricesStream method to produce this stream of

I think it has nothing to do with listing 11.12 refactoring. Maybe do you want to mean listing 11.15 or 11.16?