{"ast_node_type":"function","tokens":[{"end":66,"kind":"keyword","start":0,"text":"//!"}]}
//!     fn target(&self, e: &Ed<'_>) -> Nd { let & &(_,t) = e; t }
//!     fn source(&self, e: &Ed<'_>) -> Nd { let & &(s,_) = e; s }
//! }