syntax_data: {"ast_node_type":"other","tokens":[{"end":50,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     ///     (_    , true , _    ) => true,  // (2)
context_before:     ///     (false, false, _    ) => false, // (1)
context_after:     ///     (true , _    , false) => false, // (3)