muJSStatement (JSForLetOf _ _ _ (JSVarInitExpression id _) _ gen _ body)    = muForOf VariablePattern id gen body
muJSStatement (JSForLetOf _ _ _ (JSVarInitExpression id _) _ gen _ body)    = muForOf VariablePattern id gen body
muJSStatement (JSForLetOf _ _ _ (JSVarInitExpression id _) _ gen _ body)    = muForOf VariablePattern id gen body