    @Test
    void mergeList() {

        scope.put("f", ImmutableList.of(1L, 2L, 3L));
        processor.process(scope, parse("@extends: { f: [ 4, 5 ] } -merge true"));

        assertThat(scope.get("f")).isEqualTo(ImmutableList.of(1L, 2L, 3L, 4L, 5L));
    }