syntax_data: {"ast_node_type":"other","tokens":[{"end":18,"kind":"keyword","start":0,"text":"type"}]}
source_snippet:     type Item = T;
context_before: impl<'a, T: Copy> SliceLike for &'a [T] {
context_after:     type IntoIter = std::iter::Copied<std::slice::Iter<'a, T>>;