builder.put(tag, "jclouds-empty-tag-placeholder");
Map<String, String> common = builder.build();
if (!common.isEmpty()) {
logger.debug(">> adding tags %s to virtualmachine(%s)", common, vm.getId());
CreateTagsOptions tagOptions = CreateTagsOptions.Builder.resourceIds(vm.getId())
.resourceType(Tag.ResourceType.USER_VM)
.tags(common);
AsyncCreateResponse tagJob = client.getTagApi().createTags(tagOptions);
awaitCompletion(tagJob.getJobId());
logger.debug("<< tags added");