221     /// Retrieve the `i`th half-byte from the prefix.

   221     /// Retrieve the `i`th half-byte from the prefix.

   222     ///

   222     ///

   223     /// This is also the `i`th hexadecimal digit in numeric form,

   223     /// This is also the `i`th hexadecimal digit in numeric form,

   224     /// also called a [nybble](https://en.wikipedia.org/wiki/Nibble).

   224     /// also called a [nybble](https://en.wikipedia.org/wiki/Nibble).

   225     pub fn get_nybble(&self, i: usize) -> u8 {

   225     pub fn get_nybble(&self, i: usize) -> u8 {

   226         get_nybble(self.buf, i)

   227         get_nybble(self.buf, i)

   227     }

   228     }

   228 }

   229 }

   229 

   230 

   230 /// A shortcut for full `Node` references

   231 /// A shortcut for full `Node` references