takeUntil

Is there a way to perform `takeUntil`?

I need to split a file into lines and find the first line that matches a regex. Maybe there is another way to do this?

Cheers.

No file or test is named. Start by reviewing the existing stream operators and checking whether an equivalent to takeUntil already exists for stopping at the first regex-matching line. Done means establishing a clear supported approach for the line-splitting example, with coverage for that behavior.

Written by the indexing model from the issue text.