export var test = 'abc';

import { test } from './a';

/**
 * if we give handler type `() => boolean`, then it emits as expected.
 * seems union type doesn't work here, either.
 */
function filter(handler: any) {
    return function (target: any) {
        // ...
    };
}

class Wat {
    @filter(() => test == 'abc')
    static whatever() {
        // ...
    }
}