You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: array.rs
    path of file: ./repos/nickel/core/src/term
    
    the code of the file until where you have to start completion: use std::mem::transmute;
use std::mem::ManuallyDrop;

use super::*;

#[derive(Debug, Default, PartialEq, Clone)]
pub struct ArrayAttrs {
    /// An array is closurized when each element is a [crate::term::Term::Closure] or a constant.
    ///
    /// When initially produced by the parser, arrays aren't cl
    
    fn next(&mut self) -> Option<Self::Item> {
        if self.idx == self.end {
            None
        } else {
            let term = match &mut self.inner {
                IntoIterInner::Shared(inner) => inner.get(self.idx).cloned(),
                IntoIterInner::Owned(inner) => Rc::get_mut(inner)
                    .expect("non-unique Rc after checking for uniqueness")
                    .get_mut(self.idx)
                    // SAFETY: We already checcked that we have the only
                    // reference to inner, and after this we increment idx, and
                    // we never access elements with indexes less than idx
                    .map(|t| unsafe { ManuallyDrop::take(t) }),
            };
            self.idx += 1;
            term
        }
    }