Add missing import to Rc
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@ -594,6 +594,7 @@ mod prim_array {}
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/// [dynamically sized types](../reference/dynamically-sized-types.html).
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/// [dynamically sized types](../reference/dynamically-sized-types.html).
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///
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///
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/// ```
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/// ```
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/// # use std::rc::Rc;
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/// let pointer_size = std::mem::size_of::<&u8>();
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/// let pointer_size = std::mem::size_of::<&u8>();
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/// assert_eq!(2 * pointer_size, std::mem::size_of::<&[u8]>());
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/// assert_eq!(2 * pointer_size, std::mem::size_of::<&[u8]>());
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/// assert_eq!(2 * pointer_size, std::mem::size_of::<*const [u8]>());
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/// assert_eq!(2 * pointer_size, std::mem::size_of::<*const [u8]>());
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