syntax_data: {"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // can ensure that the type really implements `PartialEq`.
context_before:     // we'll need to leave some sort of trace of this requirement in the MIR so that borrowck
context_after:     // We also do *not* require `const PartialEq`, not even in `const fn`. This violates the model