syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // frequently arises if we have an unconstrained input type --
context_before:         // figure out if they contain mutual incompatibilities. This
context_after:         // for example, we are looking for `$0: Eq` where `$0` is some