`border::FULL` uses a full block symbol, while `border::EMPTY` uses an
empty space. This is useful for when you need to allocate space for the
border and apply the border style to a block without actually drawing a
border. This makes it possible to style the entire title area or a block
rather than just the title content.
```rust
use ratatui::{symbols::border, widgets::Block};
let block = Block::bordered().title("Title").border_set(border::FULL);
let block = Block::bordered().title("Title").border_set(border::EMPTY);
```
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