Function process_until_first_err

pub fn process_until_first_err<I, F, E>(
    iterable: I,
    process_function: F,
) -> Result<(), E>
where
    I: IntoIterator,
    F: FnMut(I::Item) -> Result<(), E>,

Executes the process_function on each of the items in the iterable, and then returns Ok(()). It stops execution if any of the process functions returns an Error, and returns said error.