[**brk-client**](../README.md) *** [brk-client](../globals.md) / SingleItemBuilder # Interface: SingleItemBuilder\ Defined in: [Developer/brk/modules/brk-client/index.js:1445](https://github.com/bitcoinresearchkit/brk/blob/1ddb3385e298de5498f1b3bf48bb88ed008d8e17/modules/brk-client/index.js#L1445) ## Type Parameters ### T `T` ## Properties ### fetch > **fetch**: (`onUpdate?`) => `Promise`\<[`SeriesData`](../type-aliases/SeriesData.md)\<`T`\>\> Defined in: [Developer/brk/modules/brk-client/index.js:1446](https://github.com/bitcoinresearchkit/brk/blob/1ddb3385e298de5498f1b3bf48bb88ed008d8e17/modules/brk-client/index.js#L1446) 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:1447](https://github.com/bitcoinresearchkit/brk/blob/1ddb3385e298de5498f1b3bf48bb88ed008d8e17/modules/brk-client/index.js#L1447) Fetch as CSV #### Returns `Promise`\<`string`\> *** ### then > **then**: [`Thenable`](../type-aliases/Thenable.md)\<`T`\> Defined in: [Developer/brk/modules/brk-client/index.js:1448](https://github.com/bitcoinresearchkit/brk/blob/1ddb3385e298de5498f1b3bf48bb88ed008d8e17/modules/brk-client/index.js#L1448) Thenable