params.put(ProcessConstants.ES_PLUGIN_LISTUPDATE_ID_FIELD, "key");
params.put(ProcessConstants.ES_PLUGIN_LISTUPDATE_ID_VALUE, "1");
params.put(ProcessConstants.ES_PLUGIN_LISTUPDATE_VALUE, mapOf("key", "1", "value", "a"));
script = factory.newScript(params);
script.setNextVar("ctx", ImmutableMap.of("_source", source));
script.run();
mapFields = (Collection) source.get(listField);
assertThat(mapFields).hasSize(2);
// updated second item in list
params = new HashMap<String, Object>();