### Question:
DatabaseConfig implements ArchivableResource, AccountIdAwareResource { @Override public void unsetRelationsToEntitiesToBeDeleted() { server = null; }  Long getId(); @Override String getAccountId(); Crn getResourceCrn(); String getName(); String getDescription(); String getConnectionURL(); DatabaseVendor getDatabaseVendor(); String getConnectionDriver(); Secret getConnectionUserName(); Secret getConnectionPassword(); Long getCreationDate(); ResourceStatus getStatus(); String getType(); boolean isArchived(); Long getDeletionTimestamp(); String getEnvironmentId(); DatabaseServerConfig getServer(); void setId(Long id); void setAccountId(String accountId); void setResourceCrn(Crn resourceCrn); void setName(String name); void setDescription(String description); void setConnectionURL(String connectionURL); void setDatabaseVendor(DatabaseVendor databaseVendor); void setConnectionDriver(String connectionDriver); void setConnectionUserName(String connectionUserName); void setConnectionPassword(String connectionPassword); void setCreationDate(Long creationDate); void setStatus(ResourceStatus status); void setType(String type); void setArchived(boolean archived); @Override void unsetRelationsToEntitiesToBeDeleted(); void setDeletionTimestamp(Long deletionTimestamp); void setEnvironmentId(String environment); void setServer(DatabaseServerConfig server);  }### Answer:
@Test public void testUnsetRelationsToEntitiesToBeDeleted() { config.setServer(new DatabaseServerConfig()); config.unsetRelationsToEntitiesToBeDeleted(); assertNull(config.getServer()); }