@Override
public JExpression testExpr(JCodeModel codeModel, JVar sexpVariable,
JvmMethod.Argument formal) {
JExpression vectorTest = super.testExpr(codeModel, sexpVariable, formal);
if(formal.isAnnotatedWith(CoerceLanguageToString.class)) {
return vectorTest
.cor(sexpVariable._instanceof(codeModel.ref(FunctionCall.class)))
.cor(sexpVariable._instanceof(codeModel.ref(Symbol.class)));
} else {
return vectorTest;
}