[**brk-client**](../README.md) *** [brk-client](../globals.md) / SingleItemBuilder # Interface: SingleItemBuilder\ Defined in: [Developer/brk/modules/brk-client/index.js:1539](https://github.com/bitcoinresearchkit/brk/blob/07bc2d42b87ba62f766e714bbde023393049d4b7/modules/brk-client/index.js#L1539) ## Type Parameters ### T `T` ## Properties ### fetch > **fetch**: (`onUpdate?`) => `Promise`\<[`SeriesData`](../type-aliases/SeriesData.md)\<`T`\>\> Defined in: [Developer/brk/modules/brk-client/index.js:1540](https://github.com/bitcoinresearchkit/brk/blob/07bc2d42b87ba62f766e714bbde023393049d4b7/modules/brk-client/index.js#L1540) Fetch the item #### Parameters ##### onUpdate? (`value`) => `void` #### Returns `Promise`\<[`SeriesData`](../type-aliases/SeriesData.md)\<`T`\>\> *** ### fetchCsv > **fetchCsv**: () => `Promise`\<`string`\> Defined in: [Developer/brk/modules/brk-client/index.js:1541](https://github.com/bitcoinresearchkit/brk/blob/07bc2d42b87ba62f766e714bbde023393049d4b7/modules/brk-client/index.js#L1541) Fetch as CSV #### Returns `Promise`\<`string`\> *** ### then > **then**: [`Thenable`](../type-aliases/Thenable.md)\<`T`\> Defined in: [Developer/brk/modules/brk-client/index.js:1542](https://github.com/bitcoinresearchkit/brk/blob/07bc2d42b87ba62f766e714bbde023393049d4b7/modules/brk-client/index.js#L1542) Thenable