{"ast_node_type":"other","tokens":[{"end":38,"kind":"keyword","start":0,"text":"///"}]}
    /// expression needing to be unit.
    /// Used by error reporting when there's a type error in an if or match arm caused by the
    pub fn hir_get_if_cause(self, hir_id: HirId) -> Option<&'tcx Expr<'tcx>> {