Function and_then_or_clear
pub(in ::iter::adapters::flatten) fn and_then_or_clear<T, U>(opt: &mut Option<T>, f: impl FnOnce(&mut T) -> Option<U>) -> Option<U>and_then_or_clearpub(in ::iter::adapters::flatten) fn and_then_or_clear<T, U>(opt: &mut Option<T>, f: impl FnOnce(&mut T) -> Option<U>) -> Option<U>