CustomerGroupService

class CustomerGroupService {    constructor(connection: TransactionalConnection, listQueryBuilder: ListQueryBuilder, historyService: HistoryService, eventBus: EventBus, customFieldRelationService: CustomFieldRelationService)    findAll(ctx: RequestContext, options?: CustomerGroupListOptions, relations: RelationPaths<CustomerGroup> = []) => Promise<PaginatedList<CustomerGroup>>;    findOne(ctx: RequestContext, customerGroupId: ID, relations: RelationPaths<CustomerGroup> = []) => Promise<CustomerGroup | undefined>;    getGroupCustomers(ctx: RequestContext, customerGroupId: ID, options?: CustomerListOptions) => Promise<PaginatedList<Customer>>;    create(ctx: RequestContext, input: CreateCustomerGroupInput) => Promise<CustomerGroup>;    update(ctx: RequestContext, input: UpdateCustomerGroupInput) => Promise<CustomerGroup>;    delete(ctx: RequestContext, id: ID) => Promise<DeletionResponse>;    addCustomersToGroup(ctx: RequestContext, input: MutationAddCustomersToGroupArgs) => Promise<CustomerGroup>;    removeCustomersFromGroup(ctx: RequestContext, input: MutationRemoveCustomersFromGroupArgs) => Promise<CustomerGroup>;}