syntax_data: {"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// This will also change the layout to take advantage of this restriction.
context_before:     /// A pattern newtype. Takes any type and restricts its valid values to its pattern.
context_after:     /// Only `Copy` and `Clone` will automatically get implemented for pattern types.