@Override
    public VariableResolver createIndexedVariable(int index, String name, Object value) {
        return null;
    }
@see org.mvel2.integration.impl.BaseVariableResolverFactory#createIndexedVariable(int, java.lang.String, java.lang.Object)
test/common/src/main/java/io/apiman/test/common/util/TestVariableResolverFactory.java