syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"impl<'de>"}]}
source_snippet:         impl<'de> serde::Deserialize<'de> for $ty {
context_before:     ($ty:ty) => {
context_after:             fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>