An example:
```rust use ttfparser::Face; use ttfword_wrap::{Wrap, WhiteSpaceWordWrap};
// Load a TrueType font using ttf_parser
let fontdata = std::fs::read("./testfonts/Roboto-Regular.ttf").expect("TTF should exist");
let fontface = Face::fromslice(&font_data, 0).expect("TTF should be valid");
// Set up wrapping options, split on whitespace: let wordwrap = WhiteSpaceWordWrap::new(20000, &fontface);
// Use the Wrap trait and split the &str
let poem = "Mary had a little lamb whose fleece was white as snow";
let lines: Vec<&str> = poem.wrap(&wordwrap).collect();
asserteq!(lines[0], "Mary had a little lamb");
```