[**brk-client**](../README.md) *** [brk-client](../globals.md) / SingleItemBuilder # Interface: SingleItemBuilder\ Defined in: [Developer/brk/modules/brk-client/index.js:877](https://github.com/bitcoinresearchkit/brk/blob/f6020b32a7a84b2a0789fb283897b90b97fc4836/modules/brk-client/index.js#L877) ## Type Parameters ### T `T` ## Properties ### fetch() > **fetch**: (`onUpdate?`) => `Promise`\<[`MetricData`](MetricData.md)\<`T`\>\> Defined in: [Developer/brk/modules/brk-client/index.js:878](https://github.com/bitcoinresearchkit/brk/blob/f6020b32a7a84b2a0789fb283897b90b97fc4836/modules/brk-client/index.js#L878) Fetch the item #### Parameters ##### onUpdate? (`value`) => `void` #### Returns `Promise`\<[`MetricData`](MetricData.md)\<`T`\>\> *** ### fetchCsv() > **fetchCsv**: () => `Promise`\<`string`\> Defined in: [Developer/brk/modules/brk-client/index.js:879](https://github.com/bitcoinresearchkit/brk/blob/f6020b32a7a84b2a0789fb283897b90b97fc4836/modules/brk-client/index.js#L879) Fetch as CSV #### Returns `Promise`\<`string`\> *** ### then > **then**: [`Thenable`](../type-aliases/Thenable.md)\<`T`\> Defined in: [Developer/brk/modules/brk-client/index.js:880](https://github.com/bitcoinresearchkit/brk/blob/f6020b32a7a84b2a0789fb283897b90b97fc4836/modules/brk-client/index.js#L880) Thenable