### Question:
VfRollback { @Override public String toString() { return "VfRollback: cloud=" + cloudSiteId + ", tenant=" + tenantId + ", vnf=" + vnfId + ", tenantCreated=" + tenantCreated + ", vnfCreated=" + vnfCreated + ", requestType = " + requestType + ", volumeGroupHeatStackId = " + this.volumeGroupHeatStackId; }  String getVnfId(); void setVnfId(String vnfId); String getTenantId(); void setTenantId(String tenantId); String getCloudSiteId(); void setCloudSiteId(String cloudId); boolean getTenantCreated(); void setTenantCreated(boolean tenantCreated); boolean getVnfCreated(); void setVnfCreated(boolean vnfCreated); MsoRequest getMsoRequest(); void setMsoRequest(MsoRequest msoRequest); String getVolumeGroupName(); void setVolumeGroupName(String volumeGroupName); String getVolumeGroupId(); void setVolumeGroupId(String volumeGroupId); String getRequestType(); void setRequestType(String requestType); String getVolumeGroupHeatStackId(); void setVolumeGroupHeatStackId(String volumeGroupHeatStackId); String getBaseGroupHeatStackId(); void setBaseGroupHeatStackId(String baseGroupHeatStackId); boolean isBase(); void setIsBase(boolean isBase); String getVfModuleStackId(); void setVfModuleStackId(String vfModuleStackId); @Override String toString();  }### Answer:
@Test public void testtoString() { assert (vfRollback.toString() != null); }