How Annotate reference field?

I am trying to annotate the annotation values @TemplateMapping. (Java/Kotlin)
when it is literal String I can easily.
but I am having difficulty annotate when you have a variable by reference (TEMPLATE_REF).
I need support so that you can refer to TEMPLATE_REF and annotate your string.

<annotator language="UAST" order="first"
                   implementationClass="dev.TemplateVariableAnnotator"/>
class KtTemplate {

    @TemplateMapping("{{name}} - {{version}}")
    fun literalOk(name: String, version: String) {
        /*...*/
    }

    @TemplateMapping(TEMPLATE_REF)
    fun referenceFail(name: String, version: String) {
        /*...*/
    }

    companion object {
        const val TEMPLATE_REF: String = "{{name}} - {{version}}"
    }

}

image
The effect should be the same for TEMPLATE_REF

You have to implement a search of references on your own, there is no such easy thing for your annotator.

Probably can use SearchService in the current file.