[**brk-client**](../README.md) *** [brk-client](../globals.md) / SingleItemBuilder # Interface: SingleItemBuilder\ Defined in: [Developer/brk/modules/brk-client/index.js:1205](https://github.com/bitcoinresearchkit/brk/blob/d4dc1b9e4900e3787f2a133b8cac5d304acff9bf/modules/brk-client/index.js#L1205) ## Type Parameters ### T `T` ## Properties ### fetch > **fetch**: (`onUpdate?`) => `Promise`\<[`SeriesData`](../type-aliases/SeriesData.md)\<`T`\>\> Defined in: [Developer/brk/modules/brk-client/index.js:1206](https://github.com/bitcoinresearchkit/brk/blob/d4dc1b9e4900e3787f2a133b8cac5d304acff9bf/modules/brk-client/index.js#L1206) 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:1207](https://github.com/bitcoinresearchkit/brk/blob/d4dc1b9e4900e3787f2a133b8cac5d304acff9bf/modules/brk-client/index.js#L1207) Fetch as CSV #### Returns `Promise`\<`string`\> *** ### then > **then**: [`Thenable`](../type-aliases/Thenable.md)\<`T`\> Defined in: [Developer/brk/modules/brk-client/index.js:1208](https://github.com/bitcoinresearchkit/brk/blob/d4dc1b9e4900e3787f2a133b8cac5d304acff9bf/modules/brk-client/index.js#L1208) Thenable