Query on Missing `ReadonlyArray` in Effect Workshop GitHub Repository

Hello, I just started to go through https://github.com/ethanniser/effect-workshop (thanks for the thorough comments and exercises btw). It's importing

ReadonlyArray

ReadonlyArray

from

effect

effect

but it doesn't seem to exist anymore. Did it get renamed?

Query on Missing `ReadonlyArray` in Effect Workshop GitHub Repository - Effect Community