How do I get a &str or String from std::borrow::Cow?

How do I get a &str

1. Use Borrow:

   use std::borrow::Borrow;
   alphabet.push_str(example.borrow());
   

2. Use AsRef:

   alphabet.push_str(example.as_ref());
   

3. Use Deref explicitly:

   use std::ops::Deref;
   alphabet.push_str(example.deref());
   

4. Use Deref implicitly through a coercion:

   alphabet.push_str(&example);
   

How do I get a String

1. Use ToString:

   example.to_string();
   

2. Use Cow::into_owned:

   example.into_owned();
   

3. Use any method to get a reference and then call to_owned:

   example.as_ref().to_owned();