Broken Equality using Derive Eq in custom types

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4

For reference, deriving equality on enums will compare its variants which will return false when you compare different variants. To fix this, the solution is to write a custom implementation of the PartialEq trait. In my case, like this:

impl PartialEq for ItemId {
    fn eq(&self, other: &Self) -> bool {
        self.as_ref() == other.as_ref()
    }
}

Since the enum implements the AsRef trait to return the wrapped NewType struct, and this in turn implements the AsRef trait, which returns the wrapped Uuid type.