syntax_data: {"ast_node_type":"function","tokens":[{"end":58,"kind":"keyword","start":0,"text":"pub(crate)"}]}
source_snippet:     pub(crate) fn padding(width_in_bytes: usize) -> Self {
context_before:     /// A `Tree` whose layout is entirely padding of the given width.
context_after:         Self::Seq(vec![Self::uninit(); width_in_bytes])