export declare type LineItemOperationErrorReason = 'NOT_ALLOWED' | 'NOT_APPLICABLE' | 'HAS_COMPLETED' | 'HAS_NO_ACTIVE_CREATIVES' | 'CANNOT_ACTIVATE_LEGACY_DFP_LINE_ITEM' | 'CANNOT_ACTIVATE_UNCONFIGURED_LINE_ITEM' | 'CANNOT_DELETE_DELIVERED_LINE_ITEM' | 'CANNOT_RESERVE_COMPANY_CREDIT_STATUS_NOT_ACTIVE' | 'CANNOT_ACTIVATE_INVALID_COMPANY_CREDIT_STATUS' | 'UNKNOWN';