syntax_data: {"ast_node_type":"other","tokens":[{"end":10,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         //
context_before:         //     impl<#[may_dangle] P0, P1, P2> Drop for S<P1, P2, P0>
context_after:         // We want to return the parameters (X, Y). For that, we match